This is odd and hopefully Mayor Park Won-sun is found to be okay:

Park Won-sun

The mayor of South Korean capital Seoul has been reported missing and search operations are underway on Thursday, police said.

Police officers said they are looking for Mayor Park Won-sun at Seoul’s Sungbuk neighborhood where his mobile phone signal was last detected.

His daughter called police earlier Thursday and said her father has been unaccounted for, the police officers said, requesting anonymity because they were not authorized to speak to media on the matter.

Kim Ji-hyeong, an official from the Seoul Metropolitan Government, confirmed that Park did not show up for work on Thursday because of unspecified reasons and canceled all his schedules, including a meeting with a presidential official at his Seoul City Hall office.

Korea Times

You can read more at the link, but according to Yonhap his daughter called police after he “had left home four to five hours ago after leaving words like a will, with his phone currently off.” Totally bizarre and hopefully this doesn’t turn into a Roh Moo-hyun situation.