gordon corera, bbc news. in hong kong, three pro—democracy protesters have been sent to prison.la movement. the trio were jailed on an appeal from the hong kong government, which said their previous sentence of community service was too lenient. juliana liu is in hong kong. these three pro—democracy activists are making headlines in today's hong kong publications. that is correct. hong kong is still reeling from the news that the three leaders of the umbrella movement have beenjailed. this is after being tried, convicted, and sentenced last year. they have served out their sentences. but the government of hong kong decided the sentences were too lenient. they took their appeal too lenient. they took their appeal to the high court where a panel of threejudges agreed with to the high court where a panel of three judges agreed with them. the hong kong government has been saying all along this is not politically motivated, but certainly human rights groups say it is meant to be a message of deterrence to other young protesters. let me share with young protesters. let me share with y

and our security correspondent, gordon corera, is with me now.these terror suspects had in relation to the kind of plot that they were hatching? that's right, clive. the fact that the authorities have identified some of those at cambrils, as we have heard, suggests they are beginning to get their arms around and understand the nature of this cell. but it is how close they came to something much more serious, without knowing it, that will really worry them. it appears they knew nothing about this relatively large gi’oup nothing about this relatively large group building a bomb not farfrom here in barcelona. it was only because the bomb went off accidentally that the men turned to what we call low—tech terrorism. i think it was the fact that the authorities were not onto them, they didn't know about this large group of people, that will worry them going forward, as much as the terrible carnage that some of those men carried out here. gordon, thank you. before we go, i should give you some travel advice. a quick word about travel to barcelona from t

gordon corera reporting there, we will talk to him later.spondent in the town of cambrils. some news that the 17—year—old youth moussa 0ukabir, who is believed to have been responsible for the attack in barcelona, was himself killed in a terrible incident just barcelona, was himself killed in a terrible incidentjust hours later when six people died. five of those we re when six people died. five of those were young jihadis who drive their car into spectators and emerged with what appeared to be viable explosive vests, brandishing knives and sending people scattering. they were shot dead on the spot but not before they fatally stabbed a middle—aged woman. despite the return of tourists and locals and the shops reopening, until the police catch everybody responsible for these atrocities and the planning, the security forces here won't rest easy. thank you very much. it is talk to gordon. the police will be incredibly concerned about the ambitions that these terror suspects had in relation to the kind of plot that they were hatching here. the f

our security correspondent gordon corera looks at where the investigation will go.an explosion ripped through this house, in a small town south of barcelona. at first, it was reported to have been a gas leak, some kind of accident. but now, police say those inside may have been preparing a bomb using gas cylinders, before something went wrong. police suspect they were building an explosive device large enough to be carried in a truck to target the city. but something went wrong in the bomb factory, killing some of those inside. now, without a bomb, and knowing the explosion might put police on their trail, the cell decided they had to act fast. at least one member went to las ramblas in a hired van, and struck the pedestrians on thursday afternoon, fleeing the scene. that evening another van, perhaps used as a getaway vehicle, was found in a town north of barcelona. in the early hours of friday morning, the cell made another attempt to kill before they were hunted down, again using what they could, a car driven at people in cambrils, like las ramblas, a place packed

a short time ago, the bbc‘s security correspondent gordon corera gave me the latest on the police investigationter earlier today said that the cell was absolutely dismanrtled. hours later, the local regional official here in catalonia, contradicted that and said he could not be categorical that the cell had been dismantled but it is in part because there is still one individual on the run and the manhunt is still ongoing there are also unanswered questions. the services did not know about the cell, will it bring more anxiety? was a cell of people that could have been operating up to a year. bringing gas canisters to make a bomb. that is the kind of activities which security service will become. they will be wondering, was this a closed group, friends who radicalised each other and perhaps had a few contacts with others or where there links to other places, the instance so—called islamic state. on that note, islamic state have claimed responsibility, how credible is that? they issued a statement a few hours after the attack saying their soldiers add acted on a call they put out but thatis acted

authorities is that such attacks are extremely difficult to prevent. 0ur security correspondent, gordon corera done. barcelona is just the latest in a series of vehicle attacks, leaving a terrible, but tragically now almost a familiar, scene on the streets of europe. the first major incident was in nice, when a lorry ploughed into a crowd celebrating bastille day, just over a year ago. it was a target and moment to maximise the casualties and the impact. then there was a lorry attack on a christmas market in berlin, then van driven into the city centre in stockholm. and britain has not immune from what has been dubbed low—tech terrorism. in march, khalid masood ploughed into pedestrians on a westminster bridge. injune, three men drove down london bridge, before attacking people in borough market with knives. and then at finsbury park mosque, people were struck by a car. stopping these attacks is hard. here at westminster bridge they have installed these barriers to stop vehicles ramming into pedestrians on the bridge. but an attacker could just pick a different crowded place. the authorities a

our security correspondent, gordon corera, is in barcelona.ms that the terror cell behind the attacks have been broken up is bringing a sense of reassurance. that was the words of spain's interior minister today, when he said that the threat level was not going to be raised to its highest level. although the spanish government says the cell that carried out these attacks has now been dismantled, little is known about this small group of young men, mainly of moroccan descent, who apparently became radicalised and planned their attacks in the most unlikely of places. there is still one individual on the run. the manhunt is still ongoing. there are still unanswered questions. for example, how did this group go undetected for a year? was because it was a small group of local men, young man, from a town, they radicalise each other and formed a closed group the authorities did not know about? or was it because there were some links provided from abroad, perhaps morocco, with family links, iraq, syria, islamic state. that is still an unanswered quest

our security correspondent gordon corera is also in barcelona.essment of the latest developments. spain's interior minister has not raised the threat level to the highest level. well, they have said that the cell was absolutely dismantled. i should say that regional officials, here in catalonia, have contradicted that and said that they can't be categorical that the cell had been broken up. that is in partly because there is still a manhunt going on, there is still one person on the lose, who they are looking for, who they believe may have been the driver of the van which went down las ramblas, here, on thursday night. how did it go undetected for so long? is this because it was a group of young men who formed a close group that authorities did not know about, or were there some links and expertise rabada from a bore of? bats morocco, where there were family links, or perhaps the so—called islamic state and iraq and syria. that is still an unanswered question. —— perhaps morocco. tens of thousands of people in the us city of boston have demonstra

our security correspondent gordon corera is in barcelona.ing that perhaps a much bigger attack was being planned than what we saw in las ramblas and further down the coast. yes, yesterday we thought we knew what this attack looked like, an attack in which a lone attacker inspired by islamist ideology had taken his car and rammed into people, but over the last 24 hours the complexion has changed. the explosion looks like a group planning a bomb which had gone prematurely, perhaps killing one of them, so they then decided they had to act because they suspect that the authorities would get onto them. it led to them carrying out more rudimentary tax than they originally intended. all of this points to a much bigger cell and a much bigger network. the urgent question for the authorities now is how many people we re authorities now is how many people were involved? authorities now is how many people were involved ? have authorities now is how many people were involved? have they identified all of them? does the attack remain? and also how do they

our security correspondent, gordon corera, is in barcelona.has been broken down. that must be reassuring. well, spain‘s interior minister earlier today said the country‘s threat level would not be raised to its maximum level although they have put in place extra security at popular destinations like las ramblas. that was, he said, because the cell behind the attack had been absolutely dismantled and these were his words. a few hours later at the local regional official in catalonia, where they sometimes have a difficult relationship with madrid, contradict that and said he could not be categorical b—cell had been dismantled and this is partly because he was still one individual on the run and a manhunt ongoing but there are also still unanswered questions. for instance, how did this cell go undetected for close to a year? because it was a small group of local men, young men from one town, ripoll, who radicalised each other and formed a closed group which the authorities did not know about? are worthy of some links and expertise provided from a

our security correspondent gordon corera is also in barcelona — he has this assessment of the latestthe interior iniesta said the country ‘s threat level was not going to be raised to the maximum level although they have put in place extra security in popular areas. he said the cell behind the attack had been absolutely dismantled but a few hours later, the local regional official, in catalonia, where they have sometimes a difficult relationship with madrid, said he could not be absolutely sure because there is a manhunt on the run and there are also unanswered questions. the instance, how did this all go undetected for years was make was because it was a small group of young men from one town who radicalised each other and formed a close group which is the authorities did not know about all make were there links and expertise from abroad, perhaps from morocco or iraq and syria and so—called islamic state. that tonight is still an u na nswered state. that tonight is still an unanswered question. several of the men behind the attacks grew up in the small town of ripoll, north of barce

with his analysis, here is our security correspondent gordon corera., leaving a terrible, but tragically now almost a familiar, scene on the streets of europe. the first major incident was in nice, when a lorry ploughed into a crowd celebrating bastille day, just over a year ago. it was a target and moment to maximise the casualties and the impact. then there was a lorry attack on a christmas market in berlin, then van driven into the city centre in stockholm. and britain has not immune from what has been dubbed low—tech terrorism. in march, a man ploughed into a westminster bridge. injune, three men drove down london bridge, before attacking people in borough market with knives. and then at finsbury park mosque, people were struck by a car. stopping these attacks is hard. here at westminster bridge they have installed these barriers to stop vehicles ramming into pedestrians on the bridge. but an attacker could just pick a different crowded place. the authorities are also looking at things like more checks on people making short—notice rentals of vans.

authorities is that such attacks are extremely difficult to prevent. 0ur security correspondent, gordon coreraat more — if anything — can be done. barcelona is just the late nest a series of vehicle attacks, leaving a terrible but almost familiar scene on the streets of europe. the first major ince detective dent was in nice when a lorry ploughed into a crowd just over a year ago. it was a target and moment to maximise the casualties and impact. then a alreadiy attack on auto christmas market in berlin —— then a lorry attack and a van driven into the city centre in stockholm. britain has not immune. in march, a man ploughed into a westminster bridge. three men drove down london bridge injune three men drove down london bridge in june before three men drove down london bridge injune before attacking people with knives and feignsbury park mosque, people were struck by a car. stopping these attacks is hard. here at westminster bridge they have stopped the barriers to stop vehicles ramming into pedestrians on the bridge but an attacker could just pick a different crowded place. the authorities are

least seven to have been carried out in europe injust over a year. 0ur security correspondent gordon corerag at what more, if anything, can be done. barcelona is just the latest a series of vehicle attacks, leaving a terrible but almost familiar scene on the streets of europe. the first major incident was in nice, when a lorry ploughed into a crowd just over a year ago. it was a target and moment to maximise the casualties and impact. then a lorry attack onto a christmas market in berlin, then van driven into the city centre in stockholm. britain has not immune. in march, a man ploughed into a westminster bridge. three men drove down london bridge injune before attacking people with knives and then finsbury park mosque, people were struck by a car. stopping these attacks is hard. here at westminster bridge they have installed these barriers to stop vehicles ramming into pedestrians on the bridge but an attacker could just pick a different crowded place. the authorities are also looking at things like more checks on people making short—notice rentals of vans, but the problem is these attacks

gordon corera reports.mas market in berlin, and a van driven into the city centre of stockholm. and britain has not been immune from what's been dubbed low—tech terrorism. in march, khalid massoud ploughed into people on westminster bridge, before being shot dead as he approached the house of parliament with a knife. injune, three men drove down london bridge, before attacking people in borough market with knives. and later that month, worshippers near finsbury park mosque were struck by a car. one man died. the problem is that stopping these kind of attacks is hard. here at westminster bridge, they have installed these barriers to stop the vehicle is ramming into pedestrians on the bridge. but an attacker could just pick a different crowded place. the authorities also looking at things like more checks on people making short—notice rentals of vans. but the problem is these attacks require just everyday items, just a car, no guns or explosives, and with so little planning required it can be hard to spot the

security correspondent gordon corera looks at what the authorities are doing.iers to stop vehicles running into pedestrians on the bridge. but an attacker could just pick a different crowded place. the authorities are also looking at things like more checks on people making short notice rentals of vans, but the problem is, these attacks require just everyday items. just a car, no guns or explosives. and with so little planning required, it can be hard to spot them and stop them. new shock absorbing barriers like this one shown in a test may offer some protection. but counterterrorism experts caution they cannot stop all attacks happening. earlier i spoke to an expert on radicalism and security in madrid. i asked him how much of a hub barcelona is for radicalisation? the mainfour points, barcelona is for radicalisation? the main four points, there is a place in the north of morocco, barcelona, madrid and another city. barcelona is properly the second largest city in radicalisation in spain and in these last two years we have been suffering a huge amount of count