Several were killed when a truck ploughed into a crowd in France's Nice during Bastille Day celebrations.
The man who rammed a truck into a crowd at a Bastille Day fireworks display in Nice, killing 84, was "totally unknown" to intelligence services, a top French prosecutor said on Friday.
Mohamed Lahouaiej-Bouhlel was "totally unknown to intelligence services... and was never flagged for signs of radicalisation," said anti-terror prosecutor Francois Molins.
Molins, who is leading the investigation into the massacre in Nice, also said the attack was "exactly in line with the constant calls to kill" which jihadi terror groups regularly make.
Authorities said Tunisian-born Lahouaiej-Bouhlel, 31, zigzagged a truck through the crowd in the French Riviera city killing at least 10 children and teenager, and injuring 202 people.
French President Francois Hollande has said the attack was of an "undeniable terrorist nature".