The attack in Nice, France, that left 84 people dead had been planned for months, prosecutor Francois Molins has said. On July 14, Franco-Tunisian Mohamed Lahouaiej Bouhlel drove a 25-tonne truck into a crowd watching Bastille Day fireworks in Nice. Molins said photos from Bouhlel’s phone showed he likely staked out the event in Nice in 2015.

Five suspects were produced in a French court and charged with terror offences on Thursday, BBC reported. They were accused of providing Bouhlel logistical support ahead of the attack.

The attack left around 300 people injured. French President Francois Hollande declared a three-month emergency in the country following the incident. The Islamic State had claimed responsibility for the attack. French Interior Minister Bernard Cazeneuve had said the attacker appeared to have been “radicalised very quickly”.