Dec. 15 (Asia Today) -- South Korean internet giant Kakao said Monday it ordered employees to work remotely after receiving a threatening message claiming an explosive device had been planted at its headquarters in Pangyo.

Kakao said the message was received by its customer service center at about 11:15 a.m. and alleged that a homemade explosive device was placed at the company's Pangyo "Ajit" office building in Seongnam, south of Seoul.

The sender identified himself as a high school dropout and warned of possible additional attacks targeting Kakao executive sand employees, the company said. The message also included a demand for money to be deposited into a specified account and threatened further action if it was not paid, including a threat directed at Kakao's Jeju office, Kakao said.

Kakao said it immediately reported the message to police and shifted all employees to remote work as a safety precaution.

"We prioritized employee safety and decided to transition all employees to remote work," a Kakao official said.