• All five miners trapped in the El Teniente copper mine have been found dead.
• The incident was caused by a 4.2 magnitude earthquake, resulting in one immediate death and trapping others.
• Rescue efforts involved over 100 workers and extensive digging through collapsed tunnels.

All five miners trapped in a section of Chile's El Teniente copper mine have been found dead following a partial collapse triggered by a 4.2 magnitude earthquake on Thursday. The miners were located after rescue teams drilled through several meters of rock, with the last body being discovered on Sunday afternoon, said regional prosecutor Aquiles Cubillos, highlighting the tragedy's severity according to NPR and Reuters.

The earthquake caused an initial fatality on Thursday, resulting in widespread concern as rescue operations began. Codelco, the mine's state-run operator, reported that the first trapped miner was recovered on Saturday, followed by the others on Sunday, as efforts to reach them involved clearing 25.5 meters of debris, documented by Reuters and Reuters.

Operations at El Teniente have been suspended, with President Gabriel Boric announcing three days of mourning for the victims, whose ages ranged from 29 to 34 years old. Codelco's chairman, Maximo Pacheco, confirmed that an investigation would be launched to determine safety compliance and the cause of the collapse according to Channel News Asia and LA Times.

The tragedy raises significant questions regarding safety standards in one of the world's largest copper mines, which is also known for its critical role in Chile's economy, producing 356,000 metric tons last year as per data from SCMP and TRT Global.