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

Chilean authorities are racing to rescue five workers trapped in El Teniente, one of the world’s largest copper mines, after a Thursday collapse killed one person.

Codelco - which runs the mine - has been sanctioned 29 times since 2021 and has had seven fatal accidents in that time, Chile's mining regulator says.