Rescue teams had been searching for the trapped workers for days after the partial collapse of El Teniente, one of the world’s largest copper mines.

Some 100 people were involved in search for workers at El Teniente copper mine, the world’s largest underground mine.

SANTIAGO (Reuters) -Four of five trapped workers at Codelco's El Teniente copper mine have been found dead, the company said on Sunday, as rescue teams work to clear underground passages that collapsed in a strong tremor last week.