The man who killed 84 people in the Bastille Day attack in the French seaside city of Nice had expressed his interest in radical Islam, according to the Paris prosecutor.
Francois Molins, who oversees terrorism investigations, said Monday slain attacker Mohamed Lahouaiej Bouhlel had showed support for the Islamic State group and searched online for information about the Orlando attack on a gay nightclub.
Molis says Bouhlel also made reconnaissance visits to the beachfront where he used a rented truck to run down dozens of people on Nice's main promenade.
On Monday, silent tributes were held across France in honor of the victims of the July 14 attack.
Prime Minister Manuel Valls was booed as he joined thousands in Nice for a moment of silence.