The Nice attacker took selfies on the promenade hours before mowing down 84 people with a lorry on Bastille Day, prosecutors have revealed.
Paris prosecutor Francois Molins said that on the day of the attack, Mohamed Lahouaiej Bouhlel appeared to have spent much of the day on the Promenade des Anglais, taking selfies on the beach and the walkway.
It was also revealed that around eight months ago he took a picture of a news story headlined "Man deliberately rams car into cafe terrace", seemingly the first sign he was planning something.
Around the same time, Bouhlel showed a friend a video of a hostage being decapitated.
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"