turkey identifies the istanbul suicide bomber as an isil member and detains five people. >> hello, also ahead, more refugees arrive in greece, being forced back to turkey under the new e.u. deal. radio, telephones and the internet all ordered to shut down during congo's presidential election. lights out for planet earth, landmarks around the world go dim to highlight climate change.

turkey's interior minister said they suspect a suicide attacker responsible for saturday's attack was a member of isil. five people are killed, many others were wound the when the bomb went off on a crowded street. the government is now reevaluating security measures in every dimension, as omar reports. >> authorities arrested the suspect said father and brother and took d.n.a. samples and the authorities carried out tests this morning. this is when they confirmed the

identity of that saturday bomber. >> there is a huge sense of fear, and uncertainty, turkey is embracing itself perhaps for more violence to come. an operation is underway against isil fighters on the outskirts of a town in central iraq. military sources say 24 iraqi soldiers have been killed by isil in two separate attacks there. a group of bombers killed eight iraqi soldiers. the iraqi army has launched an

operation to retake towns in western anbar province. at least 43 people have been killed in a series of airstrikes in the northern syrian province of raqqa. the victims, according to monitoring groups include five children and seven women. the area is an isil stronghold, and the target of syrian government and russian attacks. activists say there are at least nine separate strikes in the area. syrian government forces have retaken control of the mountain near homs. it had previously been held by isil. in eastern homs, isil seized five checkpoints near an oil field while isil took a town near aleppo. greece has begun sending refugees back to turkey.

even as the operation begins to remove some people, more are arriving. >> this was supposed to have stopped, bullet boats keep coming in. europe's refugee crisis is far from over. the latest arrivals are refugees from syria. many of them are from the war-torn city of aleppo. they are still making the jane russ journey across the aegean sea to reach the greek islands. the european union hoped that a recent agreement with turkey would discourage asylum seekers, but people who managed to reach europe shores are still hopeful they won't be turned back. >> we are asking for asylum on human grounds. not only is there war in our country, but the situation in turkey is bad for us.

>> these people want to make their way to mainland europe in search of a better life. others want to be reunited to family members who made the journey before them. >> the situation is very bad in aleppo. we endured four years of war, bombardment, attacks. i don't want to be sent back, because my father and sisters in germany and i miss them. >> tighter restrictions imposed by some european countries and the closure of the route means these people will be stuck here. greece is no longer a transit country and there are new rules in place. >> according to the new agreement between the european union and turkey, these new arrivals could be sent back to turkey. they will be given the chance to apply for asylum, but there are no guarantees it will be accepted. human rights groups criticized the deal that would also involve the e.u. resettling more than 70,000 refugees from turkey. they fear the majority of those who arrive in europe qualify as refugees and require protection. >> it's 10 or 11 kilometers from greece to turkey, so this port

now they told me six hours inside the water we lost, ok, and the smuggler go back to turkey, so i don't think they will be agreed to back to turkish. >> some are not aware of the new rules and restrictions. all they know is they managed to escape war and are hopeful their lives will become better. >> she tells us that she was scared while crossing the sea. she also knows why her family had to do it. the situation in aleppo is very bad because of the bombardment, she says. the agreement to send back new arrivals on the island entered force on sunday. the e u.s. promised greece assistance to deal with the asylum cases.

these people say they won't accept any move to take a step back. lesbos, greece. >> villages in the palestinian community of douma have accused israeli settlers of arson. a fire broke out of a home belonging to the main witnesses in another arson case in the occupied west bank. last july, an 18-month-old baby boy was killed with his parents when his home was burned down by settlers. no casualties have been reported in this latest incident. >> hundreds of people have been killed in taiz. hospitals that are already stretched are struggling to cope with the rising number of casualties, as we report. >> a shell hits near a group of people in taiz. fighting for control of yemen's third largest city has destroyed many areas, and killed hundreds of people. the city is divided.

the government controls district in the south and east. houthi rebels and former president al saleh control the west, and north. hospitals are overwhelmed with the rising number of casualties. >> the street was bustling with people when the barrage of shells landed here, killing many innocent people. >> these are government troops trying to halt a houthi counter offensive. days after suffering losses in taiz, the shia rebels are on the attack to recapture a military base. fighting has turned into street battles. the government of president adou rabbo mansour hadi are sending reinforcements. these fighters have been deployed to secure the mountains surrounding the city. this is another battlefield in yemen's conflict. government troops launching an offensive to recapture areas

under houthi control where the last remaining houthi held areas in southern yemen. government forces are backed by local tribes and kurdistan fighter jets. >> we have started to make gains. >> new recruits are joining the fight. they are government loyalists, all say they are determined to defeat the houthis, but the fight may not be over anytime soon, as neither side seems able to achieve a decisive victory. al jazeera. south africa's rule party is meeting today and says the future of president zuma is not officially on the agenda but the gathering has been overshadowed by more allegations of scandal

involving africa's leader and his opponents are calling on him to go. we have this report from pretoria. >> there have been mixed messages over the course of the weekend from the national executive committee of the african national congress, around to what extent it will be discussing these allegations against president jacob tshuma. he's within accused or rather his relationship with a prominent influential family here in africa that originally hail from india have been under question in terms of what influence this family has in terms of the relationship with president jacob tshuma. a number of accusations and revelations have come out in recent days and despite this, the national executive committee or all indications from the committee are that these allegations won't necessarily be high on the agenda, rather than dealing with the president's relationship with this family, they may be discussing the issue

of state capture, the influence of corps relate arm of the average national congress, they may be discussing that more broadly. lawyers for the man accused of being the only surviving gunman from last november's paris attacks say he'll fight extradition to france. saleh abdeslam was shot in the leg as he was captured by police friday. he planned to blow himself up in the paris attacks but changed his mind. relatives friends and public are paying respects to the victim of saturday's plane crash is southern russia. more and more are laying flawers outside the terminal in attribute to the 62 passengers

and crew. en route from dubai, it came down short of the runway. officials working through the wreck only are collecting and reviewing broken pieces of the aircraft. the two black box flight recorders are in moscow undergoing further examination. giving an update earlier, the flight check chief executive from due bay gave this report. >> we now have our own specialist, a team both on the ground in ostrov and in dubai. we must not be drawn into speculation. we are asked that authorities are given the time, space they need to report definitely on the case of what happened in the accident. >> we'll explore the u.s. and

cubed tumultuous past ahead of president obama's historic visit. we speak to rural brazilians who have lost hope and faith in their warring politicians.v

hello, again, turkey said the suicide bomber behind the blast in istanbul on saturday is a suspected isil member. five arrests have been made in connection with the attack which killed five people.

iraqi forces launched an operation against isil fighters throughout western anbar. at least 24 soldiers have been killed by isil in two separate attacks on the central province. a suicide bombers have killed eight soldiers in the central town. greece has begun the pros of sending refugees back to turkey as part of the deal struck between the e.u. and turkey, but even as that operation gets underway, more refugees have been arriving. one of the last suspects wanted for alleged involvement in the 1994 rwanda genocide have been handed over to the u.n. by the democratic republican of congress. the u.n. said a form irmayor has been held in detention since december. the rwanda government says he took part in the planning and execution of 20,000 tutsis over a four day period. he had a $5 million bounty on

his head. >> there are elections right across africa on sunday. it's a pretty tense situation in the republican of congo where the president is expected to prolong his 32 year term of office. elsewhere, niger is holding its first presidential runoff with the opposition boycotting the vote, incumbent is more than likely to get a second term, while people in tanzania saw to know must region are heading back to the polls for a controversial rerun of presidential elections and in senegal, a referendum is held on constitutional reforms, which include reducing presidential terms from seven to five years, let's take a more in-depth look now starting with the republic of congo. the government there has order add complete shut down of communications for the next 48 hours and it's pretty widespread, including

television, radio, mobile phone and on line information. it's also closed its land borders and stopped voters using cars, telling them to walk to polling stations instead. we have this report. when the referendum took place a few months ago when the president wanted people to vote for him to have a third term, people didn't come out in big numbers, but now look at it. people are slowly coming out, looking for their names on the voters roll. if the name is on the list you see, they would then go inside to vote. this is a contingent election. the opposition are saying they have not been allowed to campaign, saying they have been intimidated and the pros will be free and fair. the european union saying the trouses is not transparent but the african --

last year, the president ran for a third term. people are saying maybe this election is a case of double standards. why that is? some political analysts are saying it could be economic influence. they have been silent on the election, speaking out about the present time to extend his term in office. they are saying it could be because of economic interests. this country is the fourth largest oil producer in sub saharan africa and that is why some are supporting the process and some are quiet. that's where they are going in to vote. this is an opposition stronghold. opposition are saying that they want people to come out this time and vote to show basically how they oppose the process. they want this election to go

into a second round, the president has said that he'll win resoundingly in the first round. the concern have is what will happen after the results. opposition are saying they are not going to accept the results if the president wins. >> in niger, a presidential election runoff is going ahead. the president is expected to win a second term. there is a boycott of elections in zanzibar. in senegal, people are deciding whether to change their constitution. among amendments proposed is a reduction in the length of presidential terms and whether the national assembly should be given more power. u.s. president obama is expected to arrive in cuba later sunday, stepping into what was for a very long time enemy

territory. his visit will be a significant moment in the two nations' reconciliation. patty calhane looks back on half a century in frozen relations since the cuban revolution. >> this was the image many americans had of cuba, fidel castro, the country's leader, the face, the passionate voice of a revolution. he led the overthrow of a brutal dictator that had been backed by the u.s. now relations between the two have a fresh face. >> change is hard in our own lives and other nations. change is even harder when we carry the shared history on our shoulders. >> it took the world to the brink of a nuclear war. >> duck and cover under the table. >> it goes back to the 19th century when americans intervened in cuba's war for independence from spain.

there was economic growth, but there was also poverty and simmering resentment. in 1959, fidel castro and his followers fought their way into havana. >> new york's pennsylvania station rarely has seen anything like it. >> he soon traveled to the united states, only to be very publicly shunned by president eisenhower who went golfing to avoid the meeting. >> it was very awkward. castro said we are going to go to washington, but we are not going to do it what other presidents of these banana republics do, kowtow to washington and get down on our knees and beg for money. the u.s. began in earnest to try to overthrow castro. the u.s. sent exiled cubans to the island in what was known as the bay of pigs invasion. it failed miserably.

behind the scenes, the c.i.a. tried repeatedly to kill him in a series of botched plots. in 1962, cuba became the center of the cold war. the u.s. realized the soviet capable of carrying nuclear weaons on the island. >> it shall be the policy of this nation to reward any missile as an attack by the soviet union on the united states, requiring a full retaliatory response. >> this was the most dangerous time of the cold war and arguably one of the most dangerous moments in human history. >> the soviets eventually removed the missiles but the u.s. and cuba were now firm enemies. the countries remained in a stalemate until this. fidel's brother, raul, took over, and this handshake signaled things could change. and they did. now with this visit, president

obama hopes to solidify his new approach, but he could only do so much. the embargo could only be lifted by the u.s. congress which has shown no indication that it's going to do that. >> brazil's president rousseff filed a criminal complaint against a senator in response to that allegations made against her. she says she knew about an embezzlement scheme at at the time pro brass. the former leader of the party has accused her of funding the presidential am pain with the money. the government plans to appeal a supreme court ruling preventing former president desilva from taking up a cabinet post. away from all of that, people living in small towns in rural brazil have been watching it all unfold with dismay like those in opinion polls -- i'm sorry, in a

town of 20,000. we have this report. >> the noise of protests replaced by the sound of horses gallops on cobblestone streets. here it's just another day on horseback getting from one place to another. when 18-year-old lopez looks at the politician in his country, he sees little hope. >> the politicians are only there to steal from the people. and from those of us who are poor, we are just trying to figure out how to pay for a bag of rice. >> here, people are quiet, humble, working class, and they're watching from afar as their country's government faces the worst crisis in a generation and they're losing faith. >> we get one politician and they are corrupt. we get another and they are corrupt, too.

everywhere you look, politicians from all sides are corrupt in this country. >> in rio de janeiro, hundreds of thousands of anti-government protestors took to the streets, calling for the impeachment of president rousseff, who they hold responsible for economic decline and alleged close ties to corrupt officials. pro government supporters responded with huge protests of their own, saying it's a coo, and they won't stand for it. the deepening crisis threatens to bring down the government, and it has the potential to get worse very soon. >> here in the capital of brasilia, the political situation could become more volatile this week when lawmakers here at congress are expected to open the first phase of impeachment hearings against the president.

>> they're watching developments, but not today. no matter the differences, on this day, the one thing that brings everyone together is the local neighborhood football championship. even those far from the traditional seats of power, realize this crisis is one of the worst the country has faced for many years. >> protestors marched to china's central government demanding to know the whereabouts of a publisher. north korea's leader kim jong-un has been overseeing military drills, coastal exercises and rocket fire. on friday, north korea was accused of firing a ballistic missile into the sea. further in flaming tensions on

the peninsula. voting under way in tibet. people have been casting their votes where the government is based. more than 80,000 are expected to vote. the dalai lama fled to india following a failed rebellion against chinese rule. thousands of landmarks and buildings around the world turned off their lights for earth hour saturday. millions of people in 178 countries took part. we have this report. >> going dark to shine a light on climate change, more than 7,000 cities taking turns to switch off their lights for an hour at 8:30 p.m. local time. landmarks across russia's capital moscow eliminated only by the candles of those that gathered for the initiative. >> the goal of this event is to

remind us of the limits of national riches, our resources and how finite human life is. >> paris showed the love for the environment without the glow of the eiffel tower. the world's tallest building in dubai sits in the blackness of night. from sydney to taipei, millions coming together to raise awareness about the environment. >> i'm also here to support environmental protection, the recent cold weather, a climactic abnormality left me to realize the importance of the environmental protection for our planet. >> this is the 10th year of the movement. the 60 minutes of action worldwide keeps the momentum going to address an issue that's affecting us all. gerald tan, al jazeera.

plenty more video with the latest news on aljazeera.com. a unique way. this is a show about science... >> oh! >> oh my god! >> by scientists. >> tonight, techknow investigates shrimp safety. >> seafood by nature is a high risk commodity. >> americans love their shrimp, but most of it comes from countries that use extensive