Over 80 people are dead and 100 injured after a truck rammed into a crowd celebrating Bastille Day in the French Riviera town of Nice on Thursday night. French President Francois Hollande said it was "obviously a terrorist attack," and the mayor of Nice called it the "worst catastrophe" to happen in the region in "modern history." The truck reportedly drove at a high speed into the crowd as it gathered on the city's Promenade des Anglais to watch fireworks. "Everyone was calling run, run, run, there's an attack, run, run, run," a witness told French TV. "We heard some shots. We thought they were fireworks because it's the 14th of July." The driver was killed by police, and investigators are working to determine his identity and find out if he had any accomplices. A police source told NBC News the identification card of a French national of Tunisian descent was found inside the truck.
This is a breaking news story. It will be updated as we know more.