A 41-year-old man, only identified by his surname Suh, is suspected of putting what seems to be an improvised explosive device made with a cluster of 10 gas canisters in a public restroom, according to police.
Also was found a memo threatening to explode Korean Air, South Korea's biggest carrier if electricity is not supplied to the Kaesong Industrial Complex by 0ct. 20. Police said that Suh told an employee at the rest stop that he discovered the device and message.
Seoul shut down the complex in North Korea's border city of Kaesong in February 2016 in response to North Korea's nuclear and missile tests.
The North hinted Friday at the resumption of the complex even as the move is an illegal act that violates property rights by South Korean firms which used to run factories there.
Police said they suspected Suh himself produced the device and then notified the attendant of it, adding that they confiscated what appeared to be explosives and gas cans at his residence.
Police are analyzing the object after retrieving it from the restroom by mobilizing a robot for explosive ordnance disposal.
"What appears to be an explosive does not have a detonator, but it seems that it can explode when heated," a police officer said.
It is not known why Suh left such a message or whether he is related to business with the Kaesong complex.
Police said that they will further investigate and request a warrant to detain him, source from the Yonhap News Agency.
