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Police have appealed for tourists with footage of the crash which injured 11 people outside the Natural History Museum to come forward.

A black Toyota Prius mounted the pavement and hit pedestrians at about 2.20pm on Saturday, sparking fears of a possible terror attack.

But Scotland Yard later confirmed the crash on Exhibition Road, South Kensington, was "not being treated as a terror-related incident".

A man in his forties was arrested on suspicion of dangerous driving and taken to a North London police station. He was released under investigation on Sunday.

A police spokesperson today said they were urging tourists who were visiting the museums and witnessed or recorded the incident to get in contact.

They added: "Anyone with information about the incident is asked to contact the Serious Collision Investigation Unit at Merton Traffic Garage on 020 8543 5157."

Those hurt were mostly suffering from head or leg injuries, the London Ambulance Service said. The majority of the injured have now been discharged.

Video footage posted on Twitter showed a man being restrained on the ground by members of the public after the incident in the heart of the capital's museums district.

Oliver Cheshire, a model and the fiance of popstar Pixie Lott, was one of those who helped hold the man down after getting out of his Jaguar.

He told the MailOnline the man was "screaming", adding: "I got out and grabbed him - three of us grabbed him - and someone phoned the police.

"He was an Uber driver, according to the girls that were in his car. I have never seen anything like it."

Pedestrians injured as car mounts pavement in museum district 7 show all Pedestrians injured as car mounts pavement in museum district 1/7 Emergency services rushed to South Kensington just after 2.20 2/7 Armed police are at the scene as the investigation continues REUTERS 3/7 Eyewitnesses said the car mounted the pavement outside the museums REUTERS 4/7 The area was evacuated and a cordon was put in place REUTERS 5/7 Police detained a man at the scene 6/7 Police at the scene REUTERS 7/7 Officers and paramedics speaking to someone who was injured in the incident REUTERS 1/7 Emergency services rushed to South Kensington just after 2.20 2/7 Armed police are at the scene as the investigation continues REUTERS 3/7 Eyewitnesses said the car mounted the pavement outside the museums REUTERS 4/7 The area was evacuated and a cordon was put in place REUTERS 5/7 Police detained a man at the scene 6/7 Police at the scene REUTERS 7/7 Officers and paramedics speaking to someone who was injured in the incident REUTERS

A Metropolitan Police spokesman said: "Whilst inquiries continue it is believed a car mounted the pavement and collided with a number of pedestrians.

"The man detained by officers is currently under arrest and is in custody at a north London police station.

"The incident is a road traffic investigation and not a terrorist-related incident."

Pictures and footage from the scene in Exhibition Road showed street damage and a massive police presence in the upmarket area, home to the NHM, the Science Museum and the Victoria and Albert Museum (V&A).

Some images showed the black Toyota Prius, registered with Transport for London (TfL) as a minicab, that had collided with a silver Vauxhall saloon and a Jaguar.

Sophie Parry and Lesley Guinness were on their way to the V&A's Pink Floyd exhibition when they saw the driver of a black vehicle swerve across the road and hit a cyclist.

First aid-trained engineer Ms Parry, 56, said: "We saw a black mini SUV - it suddenly swerved across the road and it appeared to knock a cyclist off their bike, and the cyclist was sort of being carried along on the front of the vehicle across the road and then the black car hit another car - a silver Vauxhall - and it appeared to throw the cyclist off.

"By the time we came across the road two people were helping this person in the road and it looked like they were administering first aid or just comforting them."

Both women said the front of the car was "pretty smashed up" and may have hit some nearby concrete bollards.

Ms Parry said: "I thought maybe someone might have had a heart attack behind the wheel.

"Because I thought, this is strange for a vehicle - it must have been going pretty slow there to career across and do all that damage.

"It's odd, because any vehicle there was maybe going three, four, five, six miles an hour. So I thought maybe someone had had a heart attack or something."

Dieon Rurora, 25, who works in a nearby cafe, added: "People were running down the street, falling over. It was quite scary."

Colleague Merilin Mueller, 20, added: "It just seemed like an accident because there was a police car. We couldn't see outside.

"Then there were loads of police cars and that's when all of these police came marching down saying, 'move, move'.

"They said, 'you need to evacuate'."

Downing Street had said that Prime Minister Theresa May was being kept up to date with developments.

In a message later on Twitter, she said: "My thanks to the first responders at this incident this afternoon and the actions of members of the public. My thoughts are with the injured."

The roads around the museum were open again on Sunday morning.