Four workers trapped in a collapsed copper mine in Central Chile, following a 4.3 magnitude earthquake in the area, were found dead, while one of the .

The National Copper Corporation of Chile, known as Codelco, said a “seismic event” on Thursday afternoon caused the accident. The U.S. Geological Survey recorded a magnitude 5 earthquake 17 miles northeast of Machali, where El Teniente mine is, at 5:34 p.m. local time.