An American tourist and British teacher have been identified as two of the civilian victims in the London terror attack Wednesday that left five people dead , including the assailant, and at least 40 others injured.

Kurt Cochran, 54, of Bountiful, Utah, was killed after the attacker mowed down pedestrians in a car on Westminster Bridge. His wife Melissa, 46, was hospitalized with several injuries. Teacher Aysha Frade, 43, was also killed on the bridge. The assailant killed Police Constable Keith Palmer, 48, outside the United Kingdoms Houses of Parliament, which are nearby.

A fourth victim, Leslie Rhodes, died Thursday evening at the hospital after being taken off life support, police said. Rhodes, 75, was from the Streatham area of south London.

The attacker, identified as British-born Khalid Masood , was shot to death by another officer as he attempted to enter the Parliament building. Police said Friday that his birth name was Adrian Russell Ajao.

The Cochrans were the first two people to be hit by the vehicle. Kurt Cochran reportedly jumped or was pushed from the bridge and onto the steps below. He died from his injuries.