Another sinkhole was discovered in Songpa district in southern Seoul.
According to district officials on Thursday, it opened on a sidewalk near the Bangi Intersection and is 1.5 m wide and 1 m deep. It is around 1 km from an underpass where seven were recently found.
District officials believe the sinkhole opened because KEPCO workers failed to fill in the ground properly after some digging done recently to build an underground structure.
One official said there appears to be no link to the subway construction that is being blamed for the other sinkholes.
Seoul city officials formed a taskforce after the first sinkhole was found in the area on Aug. 5. Six more sinkholes have been discovered, including a massive 80 m long underground sinkhole on Aug. 13.