A female pedestrian and another victim have been pronounced dead with many others injured after a car drove into people on Westminster Bridge in what police are saying is a "terror incident" .
Junior doctor Colleen Anderson from St Thomas' Hospital said a woman is amongst those dead and others were "catastrophically injured" when the 4x4 Hyundai vehicle drove into people on the bridge.
At least three policemen were injured outside the Palace of Westminster, with one officer stabbed.
Another woman has also been pulled out of the River Thames alive, but the injuries are not yet known.
At least 10 patients have been treated on Westminster Bridge and a number of hospitals are on alert, London Ambulance Service said.
A Metropolitan Police spokesman said a full counter terrorism investigation is underway although they cannot confirm how many are injured and to what extent
They said: "Parliament Square, Whitehall, Westminster Bridge, Victoria Street and Victoria Embankment should be avoided so emergency services can deal with the ongoing incident."
MPs are now allowed to leave the chamber and those on the London Eye pods were kept inside "for their own safety", but are slowly being permitted to leave ready to be interviewed as potential witnesses.
Witnesses hear shots and bodies scatter on bridge
London Ambulance confirmed several people including three French students have been injured after a car ploughed into pedestrians on Westminster Bridge.
The driver then stabbing a policeman before he was shot by armed officers.
Eyewitnesses described scenes of terror when gunfire rang out as the attacker approached a second officer within yards of the Houses of Parliament.
Paramedics fought to save his life and that of his victim on the floor of the cobbled courtyard in front of Parliament with Foreign Office minister Tobias Ellwood among those who rushed to help.
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