this is bbc world news — the headlines. sir alex ferguson, who led manchester united to 38 trophies during 26 years in charge, has had emergency surgery for a brain haemorrhage. russian opposition leader alexei navalny is arrested as he tries to address a protest against president putin. an erupting volcano in hawaii triggers earthquakes, including the most powerful tremor to hit the state since 1975. a space rocket has begun a six—month journey to take a probe to mars, to help scientists study what's beneath the planet's crust. at ten o'clock a full round—up of the day bus news. first its time for our world — in which yalda hakim investigates iraq's war on the drug — crystal meth. a hunt is under way.

basra police, on the back of a tipoff, think they've found their target. a suspect they believe has been dealing in the highly addictive and illegal drug, crystal meth. kidnapping, extortion,

organised crime are already part of daily life here in basra, iraq's second city. now there's a new threat, crystal meth. i've been invited tojoin the police frontline. this is the elite force that goes out every night on raids to try and crack down on organised crime in this city. they think the suspect is inside. major mithak is leading the raid.

with him, officers from the counter—narcotics unit and swat team. injust two years, police have made more than 4,000 drug—related arrests. at police headquarters, they're keen to show off the results

of their efforts. today, hundreds of suspects are being paraded in front of the cameras. the police want to show the local media, and i suppose the community, the arrests they've made and the progress they're making to crackdown on crime basra. general abdul karim is leading that effort. a war veteran, he recently returned to basra from the fight against isis in the north of iraq. 0k, we're going to go and meet some people whose been arrested. wow, 0k. when did you arrest these guys? where were these guys arrested?

police say consumption of meth has been doubling year—on—year. so you found all these weapons? that's crystal meth. how many grams? 0ne. 1g. so why has crystal meth taken hold in this city? weak border security has meant drugs have flooded into the country, and economic collapse with youth unemployment at almost 50% means there's a ready for the drug. after years of war, occupation and insurgency, the locals here had hoped their city would become the next dubai.

but there are no skyscrapers here, just high unemployment, crime and corruption. at basra general hospital, psychiatrist doctor al sabbagh has been seeing more patients come forward with meth addiction. what is the scale of the problem? in 2015, the iraqi government, together with the us department

of health, ran a study looking at addiction in basra. there were once high hopes for iraq's second city. oil production in basra province generates 95% of the country's oil wealth. but most residents don't see any of that. this is jumhuriyah, one of the poorest most densely

populated parts of town. most of the young people here haven't finished school, they're out of work. jumhuriyah is notorious for gangs and drug dealing. shallal rady, who's 21, has never worked. so do you feel safe here? what about drug users? hello, how are you? nice to see you.

i went to see shallal‘s family. salaam—alaikum... they're struggling to get by without electricity or any clean water. his father has serious health issues. what do you think about iraq now in comparison to what it was like when saddam was in power? the swat team are on the move again. this city is awash with weapons left over from the war and the fight against isis. the team are looking

for their second target. young men of the house are hauled out of their rooms. but the man they are after is missing. what has happened? it is hard to ignore basra's

crippled infrastructure. it's in these impoverished districts where crystal meth addiction flourishes. many addicts and dealers end up here at the prison. this man is the deputy governor. what are the issues you face here? prison authorities have had to expand detention centres to cope

with the numbers of attics and dealers. —— addicts. major, this is one of the rooms? how many people in this room? and this is a combination of drug dealers and drug users? yeah. you just keep them all here together in one room? yeah. i am taken deep into the prison to see what the conditions are like for those who have been convicted. quite overwhelming.

i mean, i've been to many prisons in many parts of the world but to see these people just crammed into here, they take shifts sleeping so one person will sleep and one person will stay up all night and then they swap. it is incredible. i mean, the conditions are really bad. do they go out at all? what kind of drugs did you have? crystal. how did you start using crystal meth? what about your family?

what were they seeing? your wife didn't know? ali hammoud has already served ten months of a five—year sentence for dealing. how did you become a dealer? and did your family

know you were dealing? sobs. the drugs trade has been driven

partly by the security vacuum left when forces were sent to fight isis in the north of the country. general abdul karim wants to show me the smuggling route. general, where are we going? but with so much security here, general, how were they able to get across the border? the porous border here between iraq

and iran means the southern province has become a prime smuggling route. back injumhouria, i've come to the shisha bar to catch up with 21—year—old shallal who i met earlier. i am meeting up with his friends who are all angry with the government in baghdad. what about drug abuse? that is a big problem here in basra as well. it is 3:00 in the morning and the swat team are homing in on theirfinal target in jumhouria.

meth addiction is fuelling crime in the city. and it is young men mostly who are the perpetrators. 15 years after the fall of saddam hussein, iraq is in a fragile and perilous state. with all the attention on the fight against isis in the north, basra and the predominantly shia south feels forgotten. and it is the young

who are paying the price. another iraqi generation at risk of being lost. hello once again. let's see how the rest of the weekend is going to push on. fine, dry and sunny for the most pa rt on. fine, dry and sunny for the most part on saturday, but there was low

cloud on the irish sea coasts. many more of you enjoyed pictures akin to that. it will be similar for the next couple of days. almost hard to believe for the early bank holiday in may. if you do get to 27 degrees on bank holiday monday, that will be a new mark, a record high. all thanks to that big area of high pressure settling things quite nicely for many areas. it doesn't keep the atlantic for the day from the north—west of scotland. more cloud, rain and breeze. burki along irish sea coasts. if you have plans to head to the west ‘s, don't despair. you may have to go round the headland. it could be a different kettle of fish. temperatures in the teens if not low 20s.

temperatures in the teens if not low 205. a temperatures in the teens if not low 20s. a good evening for a barbecue. a lot of finance dry weather. not the coldest of nights. 7 degrees in east anglia. here is said bank holiday monday. still that high pressure very much the dominant feature. the front not producing nearly as much rain as perhaps it may do for some on sunday. still quite a lot of cloud. yes, the odd bit and peace of rain. much of northern ireland, the south of scotland, much of england and wales, a very warm, very sunny day in prospect. perhaps not just a very warm, very sunny day in prospect. perhaps notjust as warm in the north—east of scotland. an onshore breeze perhaps. these weather fronts coming in from the atla ntic weather fronts coming in from the atlantic on tuesday. they are running into that area of high pressure. that tends to weaken the cloud and the rain associated with those fronts as they drift further east. they may drag some tied for the release. it is still very warm

indeed. they could push towards the mid—20s. i say those fronts weakening. what they will do when they pass across the british isles on tuesday night into the first part of wednesday, is they will take away the last of the real heat. the thing you will notice about wednesday, first of all, a lot more cloud, wind and rain pushing into the far west of the british isles. further east, no more of the 19 in edinburgh. we have lost several degrees. so you will towards east anglia and the south—east. nothing too shabby about 19,20. south—east. nothing too shabby about 19, 20. later south—east. nothing too shabby about 19,20. later in the week, we will be looking towards the north—west. low pressure dominating. weakening weather fronts across the british isles. isobars in the north. there will be a generally fresher feel. in this dip in thejet will be a generally fresher feel. in this dip in the jet stream we will have no pressure as the dominant feature. the yellows drift away. it

is my atlantic —based rather than airfrom the is my atlantic —based rather than air from the continent. the north and western part of the british isles wet and cooler, probably. as you come further south and east, the dry weather hanging on for a time. the stuff in the north—west may win out as we get to the weekend. this is bbc news. the headlines: former manchester united manager sir alex ferguson has emergency surgery for a brain haemorrhage. british fugitive jamie acourt is denied bail by a spanishjudge. he was arrested in barcelona for alleged drugs offences. russian opposition leader alexei navalny is arrested as he tries to address a protest against president putin. good evening, and welcome to bbc news. the former manchester united

manager, sir alex ferguson, is in hospital this evening after undergoing emergency surgery for a brain haemorrhage.