At least 84 people have died, including children, after a lorry slammed through a crowd celebrating Bastille Day in the southern French city of Nice.
The driver ploughed on for 2km (1.2 miles) on the Promenade des Anglais at about 23:00 local time, before being shot dead by police.
Witnesses say the speeding lorry swerved and zigzagged in an apparent attempt to hit more people.
Police reportedly found guns and grenades inside the lorry.
President Francois Hollande said the attack was of “an undeniable terrorist nature”.
Prime Minister Manuel Valls has declared three days of national mourning for the victims from Saturday.
A state of emergency, in place since November’s Paris attacks carried out by militant from the Islamic State group, in which 130 people died, has been extended by three months.