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.

Attack in Nice: more people calling for zero tolerance, constant security following attacks

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.