Three of the five workers trapped in a Chilean copper mine have been found dead, the mining company said Sunday, bringing the death toll from Thursday’s collapse to four.

Rescue teams have found a body inside a section of a Chilean copper mine that collapsed during a moderate earthquake.

Rescuers in Chile are racing to find the last two workers trapped in a mine after an earthquake. The state-owned Codelco company announced on Sunday that four workers were now known to have died since the collapse of its El Teniente mine, about 70km (43 miles) south-east of the capital Santiago.