Terror attack at France Bastille Day celebration?

Telegraph:

30 people reported killed

French tv states up to 30 people have been killed.

BFM TV reported "dozens of dead" in Nice. "It's total panic," a witness told the channel by telephone. "We saw a white lorry which drove directly into people on the Promenade des Anglais. A gunman fired into the crowd before being shot by police. Perhaps they are dead, I'm not sure."
10:45pm

Local authorities state it is an attack and several gunshots have been heard, French TV reports

Police and ambulances went to the scene and authorities from the local Alpes-Maritimes prefecture urged residents to stay indoors.

An AFP reporter described seeing a white van driving at high speed onto the famed Promenade des Anglais as people were leaving after the annual Bastille Day celebration display.

"We saw people hit and bits of debris flying around," he said.
10:34pm

Fears of terrorism

A truck has crashed into a crowd of revelers celebrating Bastille Day in the French city of Nice – prompting fears of terrorism, Peter Allenreports.

Horrific images depicting men and women lying on the side of a road close to the Promenade des Anglais appeared on social media.

Videos and photographs also showed thousands fleeing in panic following reports of loud explosions.
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The photo of the "van" looks more like a large moving van in the US.  It would be capable of significant casualties like those described.  From the reports apparently, other vehicles were involved.  The gunshots that were reported may also have been confused with fireworks displays that were going on at the same time.

TV reports indicate the driver of the truck was shot and killed by police.

Update:  The casualty count is over 70 now and could reach 80.

Update2:  The driver of the truck has been identified by local papers as a French-Tunisian.  That suggests that he was also a Muslim terrorist.