A crash involving a car has taken place by the barriers outside the Houses of Parliament earlier this morning.
An armed response team is on the scene, as well as a significant emergency services presence.
The man driving the car has been arrested.
Metropolitan Police tweeted: ‘At 0737hrs today, a car was in collision with barriers outside the Houses of Parliament.
‘The male driver of the car was detained by officers at the scene. A number of pedestrians have been injured. Officers remain at the scene.
‘We will issue further info when we have it.’