Two hundred and two others were wounded in the incident.
According to French prosecutor Francois Molins, the driver, 31-year-old Mohamed Bouhlel, was a Tunisia-born, local delivery man, who had a petty criminal history.
Molins said Bouhlel shot from the cab of the truck, as he accelerated down a crowded street at about 10:45 p.m. Thursday evening; authorities then shot into the truck, and killed Bouhlel after chasing him about 300 meters.
According to Molins, Bouhlel was not known by any intelligence agencies as having any known radical background.
In addition, Molins said no known terrorist groups have taken responsibility for the killings, although the attack fits with calls that “terrorist organizations regularly give out on their videos.”
Authorities have reportedly searched Bouhlel’s apartment, and his wife was detained for questioning Friday morning.
President Hollande has also declared a national period of mourning from Saturday to Monday, following what has been France’s third terror attack in 18 months.
“We cannot deny that it was a terror attack,” Hollande stated in a televised address. “We have an enemy who is going to continue to strike all the people, all the countries who have freedom as a fundamental value.”
Currently, nations around the world are standing in solidarity with France.
“We stand in solidarity, and partnership with France, our oldest ally, as they respond to and recover from this attack,” President Barack Obama said in a statement.
In addition, “Canadians are shocked by tonight’s attack in Nice,” Canadian Prime Minister Justin Trudeau said via Twitter. “Our sympathy is with the victims, and our solidarity with the French people.”
The terror attack has come during the height of Nice’s tourism season, when families and children were gathered in the city to watch fireworks and celebrate France’s national independence day, in the heart of the French Riviera.