”Planting a bomb”... Suspicious note at Hong Dae Entrance Station causes temporary commotion = South Korea

A note saying ``Plant a bomb'' was found in a bathroom at Hongdae Entrance Station on Line 2 of the Seoul subway, causing a brief uproar.
According to police on the 5th, at around 5:05 a.m. today, a message was sent from the men's toilet at Hong Dae Entrance Station saying, ``We are going to plant a bomb.
A station staff member reported that a piece of paper with the inscription "Please look at it" had been found. In response, the Hongik district squad, police special attack squad, forensic investigation squad, on-call squad, and others mobilized forensic dogs and detected the explosion.
A search was carried out to see if the object had been placed, but nothing was found and the search was ended at 7am. The use of the toilet was restricted to prevent loss of life during the search process. Inside the station
They did not restrict access to the subway or allow the subway to pass without stopping.