According to Le Figaro in France, another website called Nice Matin is reporting that the driver who killed at least 77 people in Nice, France tonight was from Tunisia:
Here’s the Google Translate translation:
According to Nice Matin, one of Tunisian origin Nice was driving the truck. The young man of 31 years would also fired on the crowd as he drove. The vehicle was loaded with weapons and grenades.
Here is a screenshot from Nice Martin:
And the translated version via Google Translate: