Another sinkhole in Seongdong, Gangnam... No casualties = Seoul, South Korea

Sinkholes have occurred on a road in Gangnam-gu, Seoul, South Korea, and on a road leading to Hanyang University in Seongdong-gu, South Korea, resulting in loss of life.
According to Hanyang University on the 25th, a security guard at the school discovered a hole in the ground in front of a building on the campus in Seongdong-gu, Seoul on the 24th. The hole was 150 cm deep.
The depth is about 2.5 meters, and it is believed to have been caused by water leaking from a sewer pipe running under the sidewalk and washing away the soil. A school official said, "One block of the sidewalk was missing, so we dug it up to repair it.
When we looked back, we found a hole in the ground," he said. "We are currently carrying out repair work and have erected a fence around the area for the safety of the students."
A sinkhole was also discovered on the Hanyang University campus about a month ago. At the time, the sand around the sewer pipe had not hardened enough.
The sinkhole has now been repaired. On the same day, land subsidence was also discovered in Gangnam-gu. At around 3:16 pm,
A sinkhole measuring 20 centimeters in diameter and 1.35 meters deep appeared on a road in Yeoksam-dong. No human lives were lost as a result of this accident.
Authorities, including the fire department and ward office, are restricting traffic and working to restore the scene.