Videos, photos from the scene in Nice show chaos, horror

Warning: Some images and video may be graphic.

A truck plowed into a crowd of people who had gathered to watch Bastille Day fireworks in Nice, France, killing at least 77 and injuring at least 50, officials said.

In the aftermath, those who witnessed the event posted photos, videos, and descriptions to social media, depicting a scene that was as chaotic as it was horrifying.

Mouvement de panique !! #Nice pic.twitter.com/RgXar3fWZs

— HARP DETECTIVES🕵🏻 (@harp_detectives) July 14, 2016

jss dans nice y'a des mouvements de foule de mutant on sait pas pk pic.twitter.com/ByXnaig0Qk

— yannick 🏄🏼 (@yvnnick) July 14, 2016

pic.twitter.com/0iEoJUck5A

— CertifiedTaxPlanner (@CertTaxCoach) July 14, 2016

#nice to understand the horror u have to know what happened just before. Thousands on the beach watching fireworks pic.twitter.com/kcJXDoiUh1

— CertifiedTaxPlanner (@CertTaxCoach) July 14, 2016

I'm in #nice and cannot describe the situation- scary awful. Dead bodies everywhere people killed in front of my eyes. Had to b planned

— CertifiedTaxPlanner (@CertTaxCoach) July 14, 2016

#nice saw moving truck driving full speed over crowd on promenade for at least 2-3 miles. Then massive gunfire.

— CertifiedTaxPlanner (@CertTaxCoach) July 14, 2016

Nice attack witness: "The sounds were really horrific. You could hear banging sounds as the truck drove over people" https://t.co/nLDxB7OwSN

— CNN (@CNN) July 15, 2016

Bastille Day attack: New footage shows truck driving into crowd in Nice https://t.co/m70ozUYyiv

— MSNBC (@MSNBC) July 14, 2016

Warning: The following video is graphic:

See the moment of truck terrorist attack in Nice, France#NiceAttack pic.twitter.com/AlAAjS2M0m

— Press TV (@PressTV) July 14, 2016