The man arrested over the Finsbury Park attack is now being held on suspicion of terrorism offences, Scotland Yard has said.
He was initially arrested on suspicion of attempted murder and was subsequently further arrested for the “commission, preparation or instigation of terrorism including murder and attempted murder.”
Counter-terrorism police are appealing for witnesses following the attack on Seven Sisters Road in north London.
Police say they believe the suspect acted alone “but we are of course investigating all the circumstances leading up to the attack.”
Searches are being carried out at a residential address in the Cardiff area, police said.
A video that emerged from Finsbury Park, London shows a white man near a police van. The man seemed extremely nervous, to the point of shaking.
The Metropolitan police have confirmed that the driver of the van that rammed into a crowd of people is a 47-year-old man.
He was detained by members of the public at the scene and then arrested by police in connection with the incident.
Police also said in a statement that the attacker was taken to the hospital as a precaution, and will be taken into custody once discharged.
Neither the identity of the man nor his motives have been revealed so far. No other suspects at the scene have been identified or reported to the police, but the investigation continues.
Eyewitness Abdulrahman Saleh Alamoudi, who got the suspect on the ground and held him, told BuzzFeed that the man “was screaming ‘I’m gonna kill all Muslims.’”