NICE, France - The Mayor of Nice has identified the driver in Thursday’s attack as 31-year-old Mohamed Lahouaiej Bouhlel.

NBC News reported the identity card of the French citizen of Tunisian descent was found in the truck used in the attack that killed at 84 people.

France president, Francois Hollande, has said that another 50 critically injured people are “between life and death” on Friday.

Terror experts in Europe say the truck attack represents a new method of attack for terrorists as ISIS has encouraged aspiring militants to “fill their cars with gas” and drive into crowds. No terror group has claimed the attack as of Friday.

Bouhlel was behind the wheel of a box truck that crashed through 1.2 miles of people gathered for Bastille Day celebrations in Nice. Authorities reported finding guns and grenades in the bullet hole filled vehicle, but it was later determined that they were fakes.

A state of emergency was set to expire in France where it has been in effect since last November’s attacks in Paris that took the lives of 130 people. That order has now been extended by three more months in the wake of the Nice attack.