"I can confirm everything suggests this was a terror attack in the Notre-Dame Basilica," said Mayor Christian Estrosi, a former MP with the right-wing Republicans party, in a tweet.
French anti-terrorism prosecutor Jean-Francois Ricard confirmed on Thursday that the attacker in Nice was from Tunisia and had arrived in France on October 9.
The French Formula One Grand Prix will return in 2018 after a 10-year absence with the race scheduled to take place at the Circuit Paul Ricard in southern France, regional politician Christian Estrosi said.
The pugnacious 61-year-old conservative, who was deeply unpopular by the end of his five years as president, had made no secret of his ambition to reconquer the top office.
Having headed into the match tied on 47 league goals with West Ham's former stalwart Paolo Di Canio, Antonio was delighted to have surpassed the Italian as he celebrated by lifting a cardboard cut-out of himself at the side of the pitch.
At least 10 children are among the dead in the Riviera city following a "cowardly and barbaric" atrocity believed to have been carried out by 31-year-old Mohamed Bouhlel.