SANTIAGO (Reuters) -Chilean copper miner Codelco on Sunday said two more workers trapped at its El Teniente mine were found dead, bringing the toll of fatalities from a collapse last week to four. Codelco on Saturday reported the death of one of the trapped workers,

By Daina Beth Solomon 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.

Codelco is stepping up its rescue efforts for five workers who remain trapped deep underground at the Chilean state-owned copper company’s El Teniente mine but an official said the workers there may be safe.