Two teenagers who died in a road accident last night were "being chased" by police, residents have claimed after a riot broke out.
Best friends Kyrees Sullivan, 16, and 15-year-old Harvey Evans were killed in the Ely area of Cardiff while riding an electric bike.
Tensions reached breaking point after officers were called to the scene in Snowden Road shortly after 6pm on Monday.
Some residents in the district claimed the two boys, who were named locally, were being pursued by South Wales Police – an allegation denied by the force.
Alun Michael, South Wales Police and Crime Commissioner, said "rumours became rife" of a police chase, adding that this "wasn't the case".
The force said that the collision had already occurred when officers arrived, and they remained on the scene to manage “large-scale disorder” until the early hours of this morning.
Friends of the two boys, who were from the Ely area, said they were riding a Sur-Ron electric bike without helmets when they died.
They said their families were desperate for further information from the police about what happened.
Bridy Bool, who lives nearby, said she knew the family of Harvey Evans and his mother wanted to know which hospital her son had been taken to.
“The police are not telling her where her boy is – she has been waiting all night and morning,” she said.
“They are not telling them – they are waiting for the family liaison officer. It was 2.40am when her boy’s body got moved from there. I’ve just left her house now.
“There’s no support. They are on the phone but there is no support on the ground – all this is going on and they are nowhere.”
Ms Bool claimed the fatal crash occurred because “they were being chased by the police”.
“I know they were being chased by the police as there are videos going around that the police were chasing them,” she said.
“They didn’t have helmets on and there was no reason for them to be chased.
“Harvey had just eaten his tea and had left his mum’s. He had been at home all day with his mum, and he went with his friend, and this happened.”
Paying tribute to the teenager, she said: “Harvey was such a young boy, a sociable boy, he had loads of friends and he loved motorbikes and football.
“He was best friends with Kyrees and were into the same things. It was not unusual for them to be together.”
The South Wales force said arrests have been made but did not say how many.
Specially trained public order officers were deployed, including officers from neighbouring police forces, as several vehicles were set alight, property was damaged and officers were injured.
Scenes being livestreamed on YouTube showed young people throwing fireworks and other missiles at a line of police officers with riot shields who were blocking one end of the street.
Shortly before midnight a car was set on fire and burned fiercely, while a second vehicle was overturned and also torched.
Jane Palmer, the owner of a burnt-out Ford Focus on Highmead Road, said she and her family watched from their window as rioters set fire to her car.
Ms Palmer said: “I’m disabled so now I’m trapped without my car. Why are they doing this? It’s just silly now.”
A man called Connor, who also lives in Highmead Road, said: “It’s been a mad night. This is not the norm around here but people are pretty anti-police and that’s reflected on both sides, not that that’s my opinion.”
One person was attacked because rioters thought they were an undercover officer, according to a senior officer at the scene.
Assistant Chief Constable Mark Travis said: “First and foremost our thoughts are with families of the two boys who have died following the collision in Ely and with those affected by the disorder which followed.
“These are scenes we do not expect to see in our communities, particularly a close-knit community such as Ely.
“The level of violence towards emergency services and the damage to property and vehicles was totally unacceptable.”
The riot was condemned by various politicians from across the political spectrum.
The Prime Minister’s official spokesman said: “The reports of disorder, violence, arson and specifically attacks on police officers are appalling and unacceptable.
“We remain grateful to the emergency services and first responders for all their support to the community and restoring order.”
South Wales PCC Mr Michael told BBC Radio 4’s Today programme: “It would appear that there were rumours, and those rumours became rife, of a police chase, which wasn’t the case.
“And I think it illustrates the speed with which rumours can run around with the activity that goes on on social media nowadays, and that events can get out of hand.”
Heledd Fychan, who represents the South Wales Central region for Plaid Cymru, said: “There must now be a full investigation to understand how this tragic incident led to the violence that followed to ensure peace is restored and that this never happens again.”
Cardiff Council’s leader called for calm and said it is “really important” a full investigation into the crash can take place immediately.
Councillor Huw Thomas said: “This is a tragic event and they, and we, need to understand what happened and why.
“The best way we can achieve this is by letting the investigation begin as soon as possible. Any further trouble will only delay that investigation.”
Welsh Conservative Leader Andrew RT Davies said there is “no excuse” for the disorder that unfolded and said it was “deeply concerning”.
