▲ This file graphic shows Russian and Chinese aircraft entering South Korea's air defense identification zone. (Yonhap)

China-Russia-air defense zone

6 Chinese, Russian military aircraft enter S. Korea's air defense zone: JCS

SEOUL, Dec. 14 (Yonhap) -- Six Chinese and Russian military aircraft entered South Korea's air defense identification zone (KADIZ) in the East Sea without notice Thursday, the Joint Chiefs of Staff (JCS) said, prompting the South's Air Force to send its fighter jets to the scene.

The JCS said that between 11:53 a.m. and 12:10 p.m., the two Chinese and four Russian aircraft entered the KADIZ and exited it. They did not violate South Korea's air space, it added.

The JCS said it had detected the Chinese and Russian aircraft before their entry into the KADIZ and mobilized the Air Force's fighter jets.

The air defense zone is not territorial airspace but is delineated to call on foreign planes to identify themselves so as to prevent accidental clashes.

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