Police and fire officials conduct operations at the Seosomun Overpass in western Seoul, where a collapse occurred on Tuesday. Photo by Yonhap

An aging overpass in Seoul undergoing removal partially collapsed Tuesday, leaving three people dead and three others injured, officials said.

Parts of the Seosomun Overpass and other construction debris fell to the ground at 2:32 p.m., killing two men in their 50s and 60s. One of the injured victims was later pronounced dead, raising the death toll to three.

A total of 12 workers had initially been dispatched to the site, with six people having evacuated the scene, according to the officials.

An official at the Seodaemun Fire Station said a structure supporting the overpass is suspected to have fallen after safety inspections began at about 2 p.m.