By Daina Beth Solomon SANTIAGO (Reuters) -All five workers at Chile's El Teniente copper mine who were trapped in a collapse last week have been found dead, miner Codelco said on Sunday, as it vowed to investigate the cause and improve safety measures.

A rescue operation in Chile at the world’s largest underground copper mine ended on Sunday with no survivors, as the body of a fifth missing miner was found days after a tunnel collapsed, officials said.

Chilean authorities confirmed the recovery of the body of the last missing miner following Thursday's collapse at the El Teniente mine.