Terror Attack in Westminster

Four people, including the attacker, have died in a terror attack in Westminster in London. Initially a car ploughed into pedestrians on Westminster Bridge, killing one woman and injuring several other people. The attacker's car then crashed into the railings at the Houses of Parliament, and a man with a knife got out and stabbed a police officer to death. The alleged assailant was shot by armed police.

(Photo: Armed police patrol in Westminster. Credit: EPA.)