Suspect in car crash outside U.K. Parliament is British citizen, reports say

A man detained on suspicion of carrying out a terrorist attack outside Britain's Parliament is Salih Khater, a British citizen of Sudanese origin, according to media reports.

European security source says 29-year-old is from Birmingham and wasn't known to security services

Police officers stand on Wednesday at a vehicle barrier to the Houses of Parliament where a car crashed after knocking down cyclists and pedestrians in Westminster, London, a day earlier. (Hannah McKay/Reuters)

A man detained on suspicion of carrying out a terrorist attack outside Britain's Parliament is Salih Khater, a British citizen of Sudanese origin, a European security source told Reuters on Wednesday.

Other British media also identified the suspect as Khater, although authorities have not formally released his name.

Police believe a car was deliberately driven into pedestrians and cyclists, injuring three people before ramming a security barrier outside Parliament during Tuesday morning rush hour.

A man has been detained on suspicion of terrorism offences 0:24

The 29-year-old driver was arrested by armed officers at the scene moments later. He is currently being questioned on suspicion of preparing acts of terrorism and on Wednesday was further arrested on suspicion of attempted murder,  although police have said he is not co-operating with detectives.

On Wednesday police said that they had obtained a warrant to detain him for longer before deciding whether to charge him.

The security source told Reuters that Khater was from Birmingham, central England, and was not known to security services before Tuesday.

Nassar Mahmood, a trustee at Birmingham Central Mosque, said that he had spoken to members of the local Sudanese community, and understood that Khater had gone to London for visa reasons and had paperwork with him.

"He was actually trying to apply for a visa, through the Sudanese Embassy, to go back to Sudan," he told reporters.

Mahmood said he had heard that Khater did not worship at the mosque and had not shown signs of radicalization.

A spokesperson for Coventry University, also in central England, told the Daily Telegraph newspaper Khater had studied accountancy from September 2017 until May 2018 but failed his first year course and lost his place.

On Wednesday, London police confirmed that they were satisfied they knew the identity of the arrested man, saying he was originally from Sudan although they did not name him.

Man arrested after vehicle swerves into opposite lane outside British Parliament, hitting cyclists and pedestrians 1:07

In a statement, police said officers were still searching one address in the city of Birmingham but had concluded their investigations at two other properties in Birmingham and Nottingham, also in central England.

"The priority of the investigation team continues to be to understand the motivation behind this incident," the statement said.

Speaking shortly after the incident, Britain's counter-terrorism police chief said that given the iconic location and the method used, it appeared the incident was "a deliberate act" and was therefore being treated as a terrorist incident.

Video footage showed the car veering across the road and into a security lane leading to Parliament before smashing into the barrier. No one else was in the vehicle at the time and no weapons have been found.

The car involved, a silver Ford Fiesta, has been removed and the security lane was open as usual. The Fiesta was driven down to the British capital from Birmingham on Monday night and was then in the Tottenham Court Road area,  near central London's main shopping district, for about four hours, police said.

Police said the incident appeared to be the second terrorist attack at the Parliament buildings in just under 18 months, after a British-born Muslim convert killed four people on nearby Westminster Bridge in March 2017.

He also stabbed to death an unarmed police officer in the grounds of Parliament before being shot dead.

It was the first of five attacks in Britain last year that police designated as terrorism. Three of them involved the use of vehicles as weapons.

Forensic investigators at the site of the car crash, which injured three people. (Hannah McKay/Reuters)

Tuesday's attack has prompted a debate about banning traffic from the square and making it a pedestrian area, an option favoured by London Mayor Sadiq Khan.

"I've been an advocate for a while now of part-pedestrianizing Parliament Square, but making sure we don't lose the wonderful thing about our democracy which is people having access to parliamentarians, people being able to lobby Parliament, and visitors being able to come and visit Parliament," he told the BBC.

London police Chief Cressida Dick said they would discuss the idea with Khan, Parliament's authorities and the intelligence agencies.

"As with anything, there is a balance to be drawn. Vehicles are on our streets all the time. We have crowds on our streets as well. The terrorists want us to completely change our way of life," she told LBC radio.

"We're not going to just change our lifestyle but it is important that we take reasonable measures, as I think we have been doing over the last several months to try to make sure that the most iconic sites, including those in central London, are well protected."