French public prosecutor of Paris Francois Molins | Francois Guillot/AFP via Getty Images Nice attacker had five accomplices: media report Suspects are in custody and face terrorism charges for their roles in Bastille Day attack.

The Paris prosecutor said Thursday that the Nice attacker, who slammed a truck into a crowd celebrating Bastille Day in Nice, had accomplices, according to an AP report.

The prosecutor, Francois Molins, also said the attacker, who had been identified as Mohamed Lahouaiej Bouhlel, had planned the carnage on Promenade des Anglais in Nice during France's National Day celebrations for a month. Eighty-four people were killed and hundreds were injured in the attack.

Molins said that his office, which is in charge of overseeing terror investigations, said five people, currently in police custody, face preliminary terrorism charges for their alleged roles the attack.

Information taken from Bouhlel's phone showed searches and photos that indicated he had been studying an attack since 2015, Molins said.

The suspects are two French-Tunisians males, a Tunisian man, an Albanian man and one woman of dual French-Albanian nationality, Molins said.

Correction: This story has been amended to adjust the Nice attack death toll.