Parliament is locked down after reports of a gunman firing shots.


Here’s what we know via Sky News in London, according to an official source

• One person, who is reportedly an attacker armed with a knife, has been shot by police in Old Palace Yard.• One police officer in Old Palace Yard has been injured and is being treated for knife-related injuries at the scene.• A dozen pedestrians were reportedly struck by a vehicle on Westminster Bridge.



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