At least 84 people were killed and scores wounded after a 'terrorist' gunman drove a heavy truck at high speed into a crowd that had watched Bastille Day fireworks in the French Riviera city of Nice late on Thursday.
Interior Minister Bernard Cazeneuve said 18 of the injured were in a critical condition after the 25-tonne truck zigzagged along the seafront Promenade des Anglais as a fireworks display marking the French national day ended just after 10:30 pm
The attack, which came eight months and a day after Islamic State gunmen and suicide bombers struck the French capital on a festive Friday evening, seemed so far to be the work of a lone assailant. Newspaper Nice-Matin quoted unidentified sources as saying the driver was a 31-year-old local of Tunisian origin.
The driver also opened fire before police shot him dead.
In a pre-dawn address to the nation, President Francois Hollande said he was calling up military and police reservists to relieve forces worn out by an eight-month state of emergency begun after the Islamic State militant group killed 130 people in Paris. The state of emergency was extended by three months.
"France is filled with sadness by this new tragedy," Hollande said, noting several children were among the dead in what he said he had no doubt was an act of terrorism.
He called the carnage, which came as France celebrated the anniversary of the 1789 revolutionary storming of the Bastille, an attack on liberty by fanatics who despised human rights.
(With agency inputs)