A number of witnesses have posted videos to social media showing the chaos that erupted when shooters opened fire on police officers at a Dallas protest tonight.

Michael Kevin Bautista was close to the action. He filmed officers crouched behind police cars, some lying on the ground injured or dead, as gunshots ring out. 

Another video shows the shooter outside a building, taking cover. The video below from AP was edited, but the original footage showed the gunman executing a police officer at point-blank range.

Shots rang out as protesters chanted "Hands up, don't shoot."

Twitter users @allisongriz and @WhoAteMyPizza posted videos from another perspective showing how the shots sounded.

Stay tuned to Fox News Channel for the latest on this developing story.