Westminster is on lockdown after a terror attack where a knifeman ploughed a car into pedestrians before stabbing a policeman outside the Houses of Parliament.
Two people have died and a number of people have suffered “catastrophic” injuries after in the incident where a number of people were mowed down on Westminster Bridge by the attacker.
Witnesses described hearing people screaming and seeing bodies scatter as the car is understood to have mounted the pavement just in front of the Houses of Parliament.
Another witness said they had seen a person in the River Thames – a woman was later rescued from the water.
The car then smashed into railings surrounding the Palace of Westminster, close to Big Ben in Parliament Square, where the attacker got out and stabbed a policeman.
As he approached a second officer, he was shot by armed police. A video has emerged showing two officers pulling up outside the Houses of Parliament and then the sounds of three shots rings out.
Parliament was immediately shut down and the Prime Minister bundled into a car as officers searched the building, evacuating floors one by one.