In this frame grab taken Tuesday, Aug. 14, 2018 armed police detain a man, fifth right, who was in a vehicle that crashed into se.
A number of people were injured after a auto collided with security barriers outside London's Parliament building on Tuesday (Aug 14), police said.
The police are treating the crash, which happened around 2:40 a.m., EST, or 7:40 a.m. local time, as an act of terror.
In a statement, London's Metropolitan Police said its counter-terrorism unit is leading the current investigation.
A Met Police spokesman said: "At 7.37am today, a auto was in collision with barriers outside the Houses of Parliament". Police officers surrounded a silver auto which had hit several cyclists and arrested a man wearing a puffa jacket.
Police officers stand at a cordon after a auto crashed outside the Houses of Parliament in Westminster, London, Britain, August 14, 2018.
Photographs on social media showed the alleged driver in handcuffs being escorted away by police.
Metropolitan Police have arrested the driver of a vehicle after he crashed into the barriers outside British Parliament in Westminster.
"A number of people were injured as a result of the collision and they have been taken to hospital".
He confirmed that he not been formally identified, but on the basis of the information known so far, "we don't believe this person is known to either MI5 or counter terrorism police".
Officers proceeded to search his vehicle, confirming in a later statement that he had acted alone and that there were no weapons found in the auto.
"We're still trying to piece it together", a spokeswoman said. The London Ambulance Service said two people were taken to the hospital, but their injuries are not considered serious. Westminster Tube station is now closed.
Police earlier said they had shut Westminster subway station and cleared out hundreds of commuters.
"There was about 10 cyclists waiting for the lights to change", Barry Williams told the Telegraph.
She said: "I was walking on the other side [of the road]".
"I saw smoke coming out of the vehicle".
"I saw someone was arrested, but I couldn't see him closely. I just stopped the bus", he told PA. They put his age as being in his late 20s. So I don't know why someone would drive into the barrier.
Donovan Parsons, a cameraman for ITV's "Good Morning Britain", was filming outside Parliament when he heard a loud crash. He said he thought it was deliberate.
The Met have revealed extra officers - both armed and unarmed - have been deployed on the streets in and around central London.
The cordon extends past the Cenotaph on Whitehall - a five-minute walk from the scene at Old Palace Yard.
Sky's political correspondent Tom Parmenter said "the police response is very significant", with more officers arriving at the scene. A police woman patrols on Westminster Bridge after a auto crashed into security barriers outside the Houses of Parliament, in.
Last year Khalid Masood murdered five people, including a police officer and injured 50, when he ploughed his auto into pedestrians in a terrorist attack. Police shot that attacker dead.
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