The truck driver who launched the attack has been formally identified by the police as a 31-year-old French-Tunisian named Mohamed Lahouaiej Bouhlel.
"You go from having an absolutely marvelous time to sheer terror in a blink of an eye, literally", he says.
"After that we couldn't see what happened".
The country is still reeling from the November 13 attacks that killed 130 people at the Bataclan concert hall, Paris restaurants and cafes, and the national stadium, and a separate January 2015 iParis attack that targeted journalists at the satirical magazine Charlie Hebdo and Jews at a kosher supermarket.
U.S. Democratic presidential candidate Hillary Clinton said the attack made her "sick at heart". The attacker, Mohamed Lahouaiej Bouhlel, was slowed when a heroic member of the public leapt onto the vehicle and wrestled the driver.
Police found one pistol and various fake weapons in Bouhel's truck.
There have been no claims of responsibility although Islamic State supporters have been celebrating the attack on social media, The Wall Street Journal reported. "For all the people in France it's kind of scary", said Daridol. France has been stunned again as a large white truck killed many people after it mowed through a crowd of revelers gathered for a Bastille Day fireworks display late Thursday evening, in the Riviera city of Nice.
At least 10 children were among the dead. "They were getting more panicked every time we heard a bang, and we didn't know what it was at the time, but we know now it was gunshots". Speaking after visiting the hospital where victims were treated, he also said that France was "facing a struggle, which will be long".
As the happy mood turned to naked fear around the Promenade des Anglais people ran in panic, desperately looking for a refuge from the unfolding slaughter.
- Hollande announces that a national state of emergency that was to have been lifted on July 26 will now be extended for three more months.
Neighbours described the attacker, who was born in Sousse in Tunisia and lived in a modest district of Nice, as a loner who never responded to their greetings.
The truck attack is exactly in line with jihadist calls to action, Molins said. He wrestled with the driver, who seized a revolver and fired several shots at the man and at police.
Five individuals have also been detained for questioning by French authorities, following Thursday's attack, a spokeswoman for the French prosecutor's office said Saturday.