The Bastille Day killer sent chilling text messages just minutes before the deadly attack in Nice, according to French TV reports.
Moments before Mohamed Lahouaiej Bouhlel ploughed a truck into a crowd and killed 84 people, he sent messages detailing his plans.
One read: "Bring more weapons. Bringing in 5," according to judicial sources quoted by French TV.
An earlier text read: "It's good. I have the equipment."
French Prime Minister Manuel Valls faced boos and calls to resign as he laid a wreath for the 84 people killed in the lorry attack in Nice.
Hours later Mohamed Lahouaiej Bouhlel drove a 19-tonne lorry down the promenade killing 84 people and injuring 200 more.
France's prime minister stated on Sunday he believed the man behind the Nice lorry attack was radicalised "very quickly"