At least 84 people have been killed after a lorry ploughed into a crowd attending Bastille Day celebrations in the French city of Nice on Thursday night, in what is being investigated as a terror attack.

Nice attack: François Hollande and Manuel Valls head to Nice to join French interior minister

At least 84 people have been killed after a lorry ploughed into a crowd attending Bastille Day celebrations in the French city of Nice on Thursday night, in what is being investigated as a terror attack.