What We Know• Four people were killed, including an attacker and a police officer, and 20 were wounded in a terror attack in London on Wednesday, the head of London’s Metropolitan Police counterterrorism unit said. • A woman who was run over on the bridge died, and the Port of London Authority said another woman was pulled from the River Thames with severe injuries. • Others injured on the bridge included three police officers and several French high school students. Advertisement Continue reading the main storyWhat We Don’t Know• If there was more than one assailant involved in the attack, or the identity of the attacker or attackers. • How many people were killed and wounded in the attack, although the police said that officers were among the casualties and the London Ambulance Service said it had treated 10 people on the bridge.

Source: New York Times March 22, 2017 16:43 UTC