South Korea: ISIS threat to U.S. air bases

The terror group has also released information on individuals in 21 countries, including the personal details of one employee of a South Korean welfare organization, the National Intelligence Service (NIS) said in a statement Sunday.

That person is now under protection, the agency said.

The NIS says ISIS' hacking organization, the United Cyber Caliphate, collected details of U.S. air force units in South Korea including Osan Air Base, and addresses and Google satellite maps have been released through the Telegram messaging service.

The U.S. military has been warned of the threat, the NIS said, and is expected to release a statement soon.

Over the past five years, 50 people suspected of being part of terrorist organizations have been deported from South Korea, according to NIS.

In its statement Sunday, the NIS warned that "terror against South Korean citizens and foreigners in this country is becoming a reality."

(CNN)