”30 people stabbed at Yatap Station, Gyeonggi Province on the 23rd” ... Police on emergency alert = South Korea

"30 people stabbed at Yatap Station on Monday." The 23rd was the day a teaser was released about a weapon being brandished at Yatap Station in Seongnam, Gyeonggi Province. Seongnam City and the police were on high alert.