The accident, which took place on Thursday, was caused by one of the largest tremors ever recorded at El Teniente, with the impact of a 4.2 magnitude quake.

At least 100 rescuers are still looking for miners who are trapped in the partially collapsed mine in Rancagua, south of Chile's capital Santiago. The disaster came after a "seismic event" in the area.

A drone view shows the entrance to Codelco's El Teniente copper mining complex, after several miners have been reported missing at the Andesita unit following a seismic incident, in Maitenes, Chile August 1, 2025. REUTERS/Pablo Sanhueza