Parliament shooting: Witness reveals knifeman ran towards Parliament
Shocked witnesses said they saw bodies lying on the ground on Westminster Bridge near Parliament.
One witness said she saw an Asian man carrying an eight-inch knife heading towards the building.
Jayne Wilkinson said: "We were taking photos of Big Ben and we saw all the people running towards us, and then there was an Asian guy in about his 40s carrying a knife about seven or eight inches long.
"And then there were three shots fired, and then we crossed the road and looked over. The man was on the floor with blood.
"He had a lightweight jacket on, dark trousers and a shirt.
"He was running through those gates, towards Parliament, and the police were chasing him."
Her partner David Turner added: "There was a stampede of people running out.
"You saw the people and you thought 'what the hell is going on'."
After the incident, Radoslaw Sikorski posted a video to Twitter purporting to show people lying injured in the road on Westminster Bridge.
Mr Sikorski, a senior fellow at Harvard's Centre for European Studies, wrote: "A car on Westminster Bridge has just mowed down at least five people."
At least four people were seen lying on the ground, some bleeding heavily and apparently unconscious, on Westminster Bridge near Britain's parliament on Wednesday, Reuters photographs showed.
One of the photographs showed a body lying under the wheels of a London bus.
An assailant was shot outside parliament by armed police, the leader of the House of Commons said on Wednesday after loud bangs were heard and a Reuters photographer saw at least a dozen injured people on the nearby bridge.
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