Westminster London attack

Members of the emergency services work to help victms on Westminster Bridge. Photo: AFP

Counter-terrorism police on Westminster Bridge, near the Houses of Parliament. Photo: AFP

People run from the scene outside the Houses of Parliament. Photo: AFP

People are evacuated from the Houses of Parliament in central London after an attacker mowed down pedestrians and stabbed a police officer to death. Photo: AFP

Armed British police officers patrol outside the Houses of Parliament in Westminster. pHOTO: afp

Armed police and forensic officers near a vehicle that crashed into the railings outside the House of Commons in central London. Photo: AFP

Armed police officers stand guard near a vehicle that crashed into the railings of the Houses of Parliament. Photo: AFP

A car stopped on the sidewalk in front of the Houses of Parliament in central London. Photo: AFP / Twitter / James West

A police boat patrols on the River Thames, near the Houses of Parliament, after the attack. Photo: AFP

Armed police officers on The Embankment, near the Houses of Parliament. Photo: AFP

Members of the emergency services stand alongside a police forensics tent on the Albert Embankment footpath, opposite the Houses of Parliament in Westminster. Photo:AFP

A victim of the attack is loaded in an ambulance at the scene. Photo: AFP

Photo: AFP

MPs were moved from the House of Commons to Westminster Abbey. Photo: Twiter / @mjgerman

Witness Steve Voake was on Westminster Bridge. Photo: BBC / Screenshot

Forensic officers work near the UK Parliament in Westminster, London, after an attacker mowed down pedestrians and stabbed a police officer to death. Photo: AFP