SANTIAGO, Aug 3 (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.

SANTIAGO (Reuters) -Chilean copper miner Codelco has discovered the remains of one of five trapped miners at its flagship El Teniente mine, it said on Saturday, bringing the death toll from a collapse caused by a strong tremor on Thursday to two people.

All five miners trapped in last weeks collapse at Chiles El Teniente copper mine have been found dead, state-run mining giant Codelco confirmed on Sunday, bringing the total death toll to six. One worker died during