News broke on Thursday night that 84 people had been killed and more than a dozen critically injured in Nice, after a lorry was driven into a large crowd of people celebrating Bastille Day.
The incident, which has been attributed to a 31-year-old man and is suspected to have been premeditated, comes eight months and a day after the attacks in Paris, in which 130 people were killed by gunmen.
President François Hollande has announced the extension of France's state of emergency - due to end on 26 July - for a further three months.
France has also declared three days of national mourning.
The below chart by Statista details the recent history of terror attacks in France:
President Hollande said in a statement that "a horror has come down on France again" adding that "the terrorist character [of the the attack] cannot be denied":
After Paris, Nice is now hit.
It is all of France which is under threat of Islamic terrorism.
It is clear we need to do all we can to fight against terrorism.
France is strong, and France will always be stronger, I assure you.
More:#JeSuisÉpuisé: People are using a hashtag to show how exhausted they are with terrorism
More:#PrayForNice: What the Dalai Lama said when asked if we should pray after terror attacks