Bodies are seen on the ground July 15, 2016 after at least 80 people were killed in Nice, France, when a truck ran into a crowd celebrating the Bastille Day national holiday July 14.

A body is seen on the ground July 15, 2016 after at least 80 people were killed in Nice, France, when a truck ran into a crowd celebrating the Bastille Day national holiday July 14.

An injured individual is seen on the ground after at least 80 people were killed in Nice, France, when a truck ran into a crowd celebrating the Bastille Day national holiday July 14, 2016.

People cross the street with their hands on thier heads as a French soldier secures the area July 15, 2016 after at least 80 people were killed along the Promenade des Anglais in Nice, France, when a truck ran into a crowd celebrating the Bastille Day national holiday July 14.

French soldiers advance on the street after at least 80 people were killed in Nice, France, when a truck ran into a crowd celebrating the Bastille Day national holiday July 14, 2016.

An injured individual is seen on the ground after at least 80 people were killed in Nice, France, when a truck ran into a crowd celebrating the Bastille Day national holiday July 14, 2016.

French police forces and forensic officers stand next to a truck July 15, 2016 that ran into a crowd celebrating the Bastille Day national holiday on the Promenade des Anglais killing at least 80 people in Nice, France, July 14.

French police forces and forensic officers stand next to a truck July 15, 2016 that ran into a crowd celebrating the Bastille Day national holiday on the Promenade des Anglais killing at least 80 people in Nice, France, July 14.

Bodies are seen on the ground July 15, 2016 after at least 80 people were killed in Nice, France, when a truck ran into a crowd celebrating the Bastille Day national holiday, July 14, 2016.

Rescue workers help an injured woman to get in a ambulance on July 15, 2016, after a truck drove into a crowd watching a fireworks display in the French Riviera town of Nice.

People react in the French Riviera town of Nice on July 15, 2016, after a van drove into a crowd watching a fireworks display.

French soldiers stand guard by the sealed off area of an attack after a truck drove on to the sidewalk and plowed through a crowd of revelers who'd gathered to watch the fireworks in the French resort city of Nice, southern France, Friday, July 15, 2016.

An overhead view shows the scene on July 15, 2016 after at least 80 people were killed in Nice, France, when a truck ran into a crowd celebrating the Bastille Day national holiday, July 14, 2016.

Bodies are seen on the ground July 15, 2016 after at least 80 people were killed in Nice, France, when a truck ran into a crowd celebrating the Bastille Day national holiday July 14.

A man walks with his hands up as police officers carry out checks on people in the centre of French Riviera town of Nice, after a van that ploughed into a crowd leaving a fireworks display on July 14, 2016.

A man sits next to a body seen on the ground July 15, 2016 after at least 80 people were killed in Nice, France, when a truck ran into a crowd celebrating the Bastille Day national holiday July 14.

French police and rescue forces vehicles are seen on the Promenade des Anglais July 15, 2016 after at least 80 people were killed in Nice, France, when a truck ran into a crowd celebrating the Bastille Day national holiday July 14.

A picture taken on July 15, 2016 shows the dead body of a person on the ground after a van drove into a crowd watching a fireworks display in the French Riviera town of Nice.

Soldiers, police officers and firefighters walk near dead bodies covered with a blue sheets on the Promenade des Anglais seafront in the French Riviera town of Nice on July 15, 2016, after a van drove into a crowd watching a fireworks display.

Police officers stand outside the French Interior Ministry in Paris on July 15, 2016.