A police officer who was among those killed in Wednesdays terror attack outside the British Parliament building in London has been identified as 48-year-old Keith Palmer, who worked for the Metropolitan Diplomatic Protection Group. He was a father and a husband.

The attack left four other people dead, including the attacker, and more than 40 injured . The assailant, who has not been identified, appeared to run over bystanders with a vehicle, then stabbed Palmer before he was shot to death by another officer trying to enter the Parliament building.