Police are conducting a search after tech giant Kakao Corporation received a bomb threat at its headquarters in Pangyo, Gyeonggi Province.

Kakao said a bomb threat had been posted twice to its customer service center's website at 7:10 a.m. and 7:12 a.m. Monday.

The suspect reportedly wrote that they had set up a self-made explosive device and threatened to kill named company executives with a homemade firearm.

The perpetrator demanded a bank transfer of 10 billion won, or around six-point-eight million U.S. dollars.

Police said their special forces and a military bomb squad had been deployed to check for explosives.

The person whose name was used to post the messages has reported identity theft, and the police are now tracking down the poster's IP address.