this is bbc world news, the headlines. the italian environment minister has said the government is ready to ban large cruise ships from the giudecca canal in venice — after a ship lost control as it tried to dock. four people were slightly hurt in the incident. china has made a rare acknowledgement that the 1989 tiananmen square protests were violently put down. defence minister way fung—hur told a conference that stopping the "turbulence" was the right thing to do. pope francis has apologised to the roma people for the roman catholic church's mistreatment of them. during a trip to romania the pope said the treament of roma communtities across europe showed catholics were not stangers to the evil of discrimination. more than half a million liverpool fans have been out on the streets of the city cheering

on the liverpool football team — after their historic european champions league win. at ten o'clock, ben brown will be here with a full round—up of today's news. but now it's time for our world, which this week captures the elusive figures known as night runners. every night, villages across rural kenya are terrorised by what people think are demonic spirits. banging. these unseen entities don't attack or steal from their victims. their only goal appears to be scaring people.

for the first time, using hidden cameras, we have captured footage of one of kenya's most secretive aberrations, the night runner. for centuries, these elusive people have been carrying out night—time raids, tormenting their neighbours. banging and rattling. across kenya it is believed thousands of people night run. who are these people, and what lies at the heart of this bizarre and ancient tradition?

i am an investigative reporter based in nairobi. and like most children in kenya, was brought up on the folklores of night running. for my people, the luo, night running is one of the greatest myths. but unlike other folklore, this one actually exists. i have acquired video footage that is, to the best of my knowledge, the only recorded evidence of night running. but are these people really possessed by demonic powers? that's what i am here to find out. it is a question many luo seem unable or are afraid to answer. maybe margaret, the elderly grandmother whose regular ordeal we filmed last night, can shed some light on why they do what they do.

do you have any suspicions of who the current night runner is? superstition and fear surround the night runners and their identity. a problem the local area chief is constantly battling with as he deals with the fallout from these nocturnal attacks. how many reports of night run ning do you get? i received several reports of night running cases, but it is difficult to prosecute them. they don't want to confront the night runners. why? cultural beliefs, some say if you mention a night runner openly

then maybe your kin will also become night runners. abel wants me to meet a woman who has been plagued constantly by night runners. but these ones are doing more than throwing stones. what i have noticed, there is a tendency of mostly widows who don't have a man in the house at night, are the ones who are targets. those are the reported cases? according to my personal observation, yes. i have been trying to track down a night runner to talk to, but finding people who will even admit to knowing one is proving very difficult.

but then i get a tipoff that directs meto a couple with two small children living on the edge of the village. this is husband—and—wife sam otieno and grace awino. they are both subsistence farmers, and they are also both night runners, and have agreed to talk to me. i feel very happy. yeah. sam told me his desire to go running

was passed onto him by his father, who had used a magic spell. and sam used the same technique to bring his wife into night running. grace and sam agreed to let mejoin them on a night run. but first, sam wanted to show me what he does.

what if they open the door and come out? as darkness falls, grace starts to feel the urge to run. she allows our camera to follow as she goes out on her nocturnal run. it's now pitch black, so we switch to infrared and grace is off. every few nights, sam and grace prowl the village, targeting homes and scaring villagers. rattling and banging. grunting.

banging. as shejumps and grunts, grace seems to enjoy the distress she is causing. having woken everyone up, grace melts into the night. i want to find out what motivates the couple to leave their children and go out into the night.

what compels you to run? what will happen if you don't run? and do you see there are people who see this activity that you do as being malicious? as with many addictions, night running can have very dangerous consequences. have you been caught?

what did they do to you the second time? so you still owe them? yeah. people get hurt when they get caught. do you think it is worth it? yeah, it is worth it. it is worth it. yeah. and there is nothing which can make you stop? even death. for me now, night running seems to be a thrillseeking activity.

many of those who engage in this practice seemed to be addicted to the adrenaline of scaring people. but some night runners have almost paid the ultimate price for these thrills. though he was horribly burnt, rather than seeking medical help

he set his own house on fire. for samuel, losing his house was better than being exposed as a night runner and being kicked out. now that you have seen the consequence of night running will that help you make a decision to stop?

while grace seems committed to stopping, sam's less sure and i worry this may cause a rift between them. many night runners not only seem unable to stop but actually become even more extreme in their action. sumenna, a widow and construction

worker has been night running for the best part of 30 years. what do you do when you run? but there is one thing that still plays on her mind when she is running. her urine fetish sounds like a way to make the experience more extreme. perhaps over time night runners need to take even greater risks to get their thrills.

night falls and she begins to feel the urge to run. after some time she comes to her target. she rubs her stick along the roof, a ritualistic warning to her victims before she sprays their house. she squats down, bottle in hand to fill it. thenjust as she is making ready, a man emerges from the house, swinging a machete. she bolts and escapes, but it feels like a close shave.

it has now been two weeks since i last saw grace and i want to see how she is getting on.

how does this experience make you feel about night running? are you afraid? yeah, i'm afraid. grace's nighttime activities have finally caught up with her and she is in serious trouble with her neighbours. if the situation gets worse, her whole family could be driven from the home. she does not want to report the case to police, but i can help her get treatment for her leg. we take her to the nearest town for an appointment with the local medic.

sam has been looking for work in town and joins us at the clinic. it is a relief to hear grace's injuries are not too serious. when she gets an injection to bring down the swelling in her leg, mr olang tells me that grace is not the first night runner he has treated.

do you think night running is a public health risk? outside, i catch up with sam. it seems he is finally having a change of heart.

but the following morning i received a panicked phone call from grace. because she failed to pay him for his silence, the villager who attacked her two nights ago has now outed her to the entire community as a night runner. her family has been expelled from their home. only one option remains, grace's village believes a traditional healers medicine may remove the night runner curse. maybe if she appears to be cured by a herbalist, the community will allow her family to return.

what does the treatment do to rectify whatever happened to her? the treatment will cost grace 6000 kenyan shillings, or 60 us dollars.

grace's only hope now is that her community believes that the traditional healers spell has been successful and her night running days are behind her. many of the current generation want to quit because it has become increasingly dangerous to be a night runner. not long after i finished filming i learnt that sam and grace had separated. grace is no longer night running, but she still has the urge.

hello. for much of the uk over the weekend, there was plenty of cloud. you may have seen a bit of rain. but on sunday, there was a slice of hazy sunshine across eastern england where the temperature got near 30 celsius in norfolk, it's the highest the uk has had so far this year. but temperatures like that in the week ahead, well, they will become a distant memory. we are behind this weather front

for monday, cooler air has reached an across all areas, and low pressure is in control, particularly close to scotland where there will be showers. you can see the indication we are in the cooler colours here, the real warmth, the darker oranges, are across scandinavia, towards germany and poland, this is where temperatures will be getting near 30 celsius in some spots. but for monday, well, 20 will be the top of it across parts of eastern england. there will be some sunshine. england and wales catching the art shower, but many will be dry. western scotland seeing frequent showers into northern ireland as well. some will be heavy, maybe with a rumble of thunder, and they are quite blustery still with the brisk wind, temperatures here for some of us are held down into the mid—teens. as we look at the picture going from monday to tuesday, that area of low pressure is still there, still with a few showers. the further north you are, still quite breezy here, but actually we are looking to the south—west for our next weather system moving in. and that looks like bringing a spell of rain across much of the uk during tuesday as it spreads its way northwards. northern scotland, though, close to that low pressure, just with a few showers. doesn't look like much rain reaching east anglia and south—east england by the potential for a shower. still close to 20 degrees here, but it will feel rather cool

where you've got the rain. now, going into wednesday, that latest system will clear its way northwards, and then behind that it's a day of sunshine and showers for wednesday. notice the isobars relaxing out, not too many showing up across the british isles. that means the wind is light. does mean, though, if you catch a shower, could hang around for some time, could be quite heavy. there is the potential later on wednesday for seeing some more persistent rain heading into wards parts of south—east england. temperatures again, 20 the top of it, most of us are into the teens. no, this will be interesting if we get some rain here across the eastern side of the uk where it is so desperately needed by some, courtesy of this area of low pressure. some uncertainty about the position of this, but it looks like bringing a spell of rain to many eastern areas on through thursday, with showers developing again elsewhere, again, light winds, those showers hanging around. if anything, on thursday temperatures are coming down a little bit more, so it's feeling a bit cooler out there. now, going into friday, this latest area of low pressure will take its rain away, and then we're left with a gap between weather systems and the chance again for few showers breaking out. then another area of low pressure

in france looks like taking a track towards the british isles, and that means clouding over across southern parts. this is friday, though, some time away, and there's always a bit of uncertainty about the position of these areas of low pressure. but the chance of seeing more rain coming into parts of southern england on friday. sunshine and showers elsewhere. so, then, this week, low pressure has the upper hand, and that means it's looking unsubtle. it won't be wet all the time, still be some sunshine, but there will be some rain occasionally, and temperatures are at or perhaps a bit below average for the time of year. that's because we are on the northern side of the jet stream so we are in the cooler air, with this big dip in the jet stream, we have low pressure close by. here's the next one, then, next weekend, with the potential for rain. into the following week, high—pressure massing to the west, may move towards us and try to settle things down. that is a long way off. until then, maybe a bit of rain for some of our gardens.

donald trump sets off in the next few hours for his state visit to britain the president is coming here after controversial comments about the conservative party leadership and brexit — thousands of protestors are expected to demonstrate against his visit. we'll be assessing what mr trump hopes to achieve while he's in britain. also tonight: the streets of liverpool painted red as three quarters of a million fans celebrate champions league glory. we waited years for this. let's face it, we wanted the premier league, but this will do. it was amazing, i saw them last night in the pub lift the trophy, i was like, "i want to see them today!" four british climbers rescued from india's