Chile's state-owned copper company Codelco has confirmed the deaths of six miners trapped in a collapse at its El Teniente mine, one of the world's largest underground copper mines. The incident occurred following a magnitude-4.2 seismic event, which triggered a tunnel collapse. Rescue efforts began immediately, with excavation teams advancing up to 24 meters and removing over 3,120 tons of debris to reach the trapped workers. Despite these efforts, contact with the miners was not established before their bodies were found. The first body was discovered approximately 70 meters from the collapse site, with subsequent recoveries bringing the total fatalities to six. President Gabriel Boric visited the site and Codelco offices, expressing condolences and decreeing three days of national mourning. He emphasized the need for justice and assured full resource deployment for the rescue. Laurence Golborne, former mining minister, joined the international rescue council to support the operation. The Chilean prosecutor's office is conducting a technical investigation into the causes of the collapse, including whether the seismic event was natural or related to mining activities. Codelco announced it will conduct an international audit to determine what went wrong and to improve safety measures. The tragedy has deeply affected the company and local communities, with municipalities declaring communal mourning. The rescue operation has officially ended following the recovery of all six miners' bodies.