Rescuers in Chile are intensifying their efforts to locate four miners trapped in a mine that collapsed after a recent earthquake, following the recovery of one body. The state-owned Codelco company confirmed that human remains were discovered at its El Teniente copper mine, situated approximately 70km (43 miles) southeast of Santiago, Chile's capital. The mine experienced a structural failure caused by a 4.2 magnitude tremor on Thursday while the miners were working deep underground. Initially, one fatality was reported, and five miners were trapped in the incident. Codelco has not yet confirmed the identity of the victim found, but families of the trapped workers have been informed of the situation. "This discovery fills us with sadness, but it also assures us that we are progressing in our efforts,” said Andres Music, general manager of El Teniente Division. Rescue teams are employing heavy machinery to clear the debris and obstacles impeding access to the miners, with hopes of advancing at a rate of 15-20m (49-66ft) each day. El Teniente holds the distinction of being the world's largest underground copper mine and is located high in the Andes mountains of central Chile.