Seoul Mayor Oh Se-hoon was admitted to an emergency room Friday due to a sudden acute stomachache.

City officials said the mayor was taken to a local hospital at 11:30 a.m. after experiencing pain while on his way to an event organized by the Korea Senior Citizens Association in Seoul.

The mayor canceled all scheduled public events for the rest of the day.

Oh was expected to attend a foreign investment consultation meeting organized by Seoul City Hall in the afternoon.