Eiffel Tower to go dark for London

The Eiffel Tower is going dark in mourning and solidarity with Britain after an attack around the British Parliament in which four people, including the attacker, were killed.

Paris Mayor Anne Hidalgo, whose city has suffered deadly extremist attacks in recent years, announced that the tower is turning off its twinkling lights at midnight.

Three French teenagers on a school trip were among those injured in Wednesday's attack targeting pedestrians on London's Westminster Bridge and a police officer on the nearby Parliament grounds.

French President Francois Hollande has offered support for Britain and the investigation.