The total death toll stood at six, including one person who died at the time of the accident on Thursday evening, 70 hours before the final trapped worker was found.

A document from the government's mining service SERNAGEOMIN showed that in order to lift the suspension, Codelco would have to hand in four reports of the collapse at El Teniente. The reports must include an analysis of the cause of the collapse, a recovery plan and an evaluation of its fortification systems, the document said.

The state-owned company has expressed its condolences and is initiating an international investigation into the incident.