Dozens People Lying Injured in Road on Westminster Bridge

LONDON - One terror eye witness, Radoslaw Sikorski, a senior fellow at Harvard's Centre for European Studies, posted a video to Twitter showing people lying injured in the road on Westminster Bridge.

"A car on Westminster Bridge has just mowed down at least 5 people," he wrote.

Scotland Yard said it was called to a firearms incident on Westminster Bridge amid reports of several people injured.

Transport for London said Westminster underground station has been shut at the police's request, and buses diverted.

"It seems that a police officer has been stabbed, that the alleged assailant was shot by armed police. An air ambulance is currently attending the scene to remove the casualties," Lidington said.

"There are also reports of further violent incidents in the vicinity of the Palace of Westminster but I hope colleagues on all sides will appreciate that it'd be wrong of me to go into further details until we have confirmation from the police and from the House security authorities about what is going on," he added.