Members of a Central American migrant caravan violently attacked unarmed Mexican federal immigration officers with rocks and other blunt objects Tuesday after government officials tried to block the group from illegally crossing into Mexico from Guatemala.

Newly released video taken from inside one of the Mexican government vehicles shows a group of about 1,000 people walking down a road in Tapachula after refusing to turn around. Similar videos and pictures circulated by Mexican media confirm the incident took place Tuesday.