More than three dozen migrants have died in a fire at an immigration detention center in northern Mexico near the U.S. border, an official said Tuesday.

Images from the scene showed rows of bodies lying under shimmery silver sheets outside the facility in Ciudad Juarez, across from El Paso, Texas. Ambulances, firefighters and vans from the morgue could also be seen.

Thirty-nine people died and 29 were injured in the fire, which broke out late Monday, according to an official with the National Immigration Institute, who spoke on condition of anonymity because they were not authorized to speak publicly about the case.