A policeman points a gun at a man on the floor as emergency services attend the scene outside the Palace of Westminster Credit: PA
Four people have died including a police officer, and 20 injured, after a major security incident at the Houses of Parliament and Westminster Bridge.
The apparent attacker of the police officer was shot by armed police.
Scotland Yard said the attack was being treated "as a terrorist incident until we know otherwise".
MP Tobias Ellwood gave medical treatment to the police officer after he was stabbed Credit: PAEmergency services at the scene in Westminster Credit: PAParamedics at the scene Credit: PAAn Air Ambulance arrives at the scene Credit: PAEmergency personnel outside the Palace of Westminster Credit: PAArmed police at the scene Credit: PAA police dog and handler close to the Palace of Westminster Credit: PAArmed police arrive at the scene outside the Palace of Westminster Credit: PAEmergency personnel close to the Palace of Westminster Credit: PAA police officer on guard Credit: PANearby roads are cordoned off Credit: PA
