Fire authorities have recovered another body from the site of a collapsed boiler tower at a thermal power plant in the southeastern city of Ulsan.

The authorities said Sunday that the deceased worker, surnamed Kim, survived the initial collapse but died early on Friday while awaiting rescue with his arm pinned under debris.

Authorities had previously recovered two bodies from the site, while two more workers are presumed dead and two remain missing.

Meanwhile, rescue officials resumed their search for the missing workers, which had been halted due to safety concerns on Saturday afternoon. 

Drone searches conducted Sunday morning were followed by the deployment of rescue personnel.