Four people were killed, including a police officer, and at least 40 other people were injured in an attack in London that authorities have declared a terrorist incident. A man believed to be the attacker was also killed, shot by police at the scene.


The attack began when a driver struck pedestrians and three police officers on Westminster Bridge, London's Metropolitan Police said.

Witness Richard Tice told ABC News that the car jumped the curb, knocking over pedestrians, as injured people were all over on the pavement.

The suspect, who authorities believe acted alone, was shot and killed by police.

In a press conference Wednesday evening, Metropolitan Police acting Deputy Commissioner Mark Rowley said the suspect tried to enter Parliament but was stopped "very close to the gate."

ABC News