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Dramatic footage shows the moment armed police pulled a driver out of a car after it smashed into security barriers outside parliament and injured pedestrians.
Officers swooped on the scene and pulled the male driver out of the car at gunpoint.
Footage shows police surrounding the vehicle with one officer aiming his firearm inside the driver's window.
Police surround the man as officers run to and fro in the chaotic scene.
The Met Police confirmed a number of pedestrians had been injured in the incident which has put the Palace of Westminster and the surrounding area on lockdown.