Eyewitnesses described the terrifying scenes as the truck driver drove the vehicle into the crowds of people, including children, gathered to watch fireworks in celebration of the French holiday.
Journalist Damien Allemand says he saw "bodies flying like bowling pins" and "heard noises, cries that I will never forget", reports the Daily Mail.
Another bystander told BFM TV: 'Everyone was calling run, run, run there's an attack run, run, run. We heard some shots. We thought they were fireworks because it's the 14th of July. There was great panic. We were running too because we didn't want to stick around and we went into a hotel to get to safety."
A large truck has crashed into a crowd for the Bastille Day celebrations in Nice, France, killing 60 people and injuring another 100.
TIME reports thousands of people had gathered to the streets to watch the firework celebrations when a truck plowed through the crowd, sending people screaming in panic and running away from the scene.
Police suspect that this was a terror attack, which makes it the third terror attack in France over the past 18 months, following the Charlie Hebdo attack in January 2015 and the Paris attacks last year.
No group has claimed responsibility for the attacks yet. Police are set to release more information soon.
Gunfire killed the driver of the truck, however one other man involved in the attacks escaped the scene and is still on the run.