Five suspects have been formally charged over the truck attack in the French Riveria city of Nice that killed 84 people, the Paris prosecutor said.
Mohamed Lahouaiej Bouhlel, who mowed down crowds of people enjoying a Bastille Day fireworks display, had long plotted the carnage, prosecutor Francois Molins said.
The revelations come as the French government continues to be plagued by questions over possible security failings, prompting authorities to launch an investigation into potential oversights.
Molins said photos on Bouhlel’s phone showed he had likely already staked out the same July 14 event in 2015.
The Emergency Election Sale is now live! Get 30% to 60% off our most popular products today!