A man has been arrested on suspicion of terrorism offences after a car crashed outside the Houses of Parliament.
The vehicle swerved into cyclists and pedestrians shortly after 07:30 BST, injuring three people.
The suspect, in his late 20s, is not believed to be known to MI5 or counter-terrorism police, and is not co-operating with officers.
One woman is being treated in hospital for serious but non life-threatening injuries.
Of the victims, one man has been discharged from the hospital, another woman is still being treated for non-serious injuries and a third person was treated at scene.
The driver was alone in the car and no weapons were recovered at the scene.
Following the incident, the nearby Westminster Underground station was closed, according to Transport for London, while roads nearby were cordoned off.
The area is popular with tourists visiting the Houses of Parliament and Westminster Abbey.
Image credit: CNN