Chinese and Russian planes enter South Korea's air defense zone

Yonhap reports, citing a representative of the Seoul Joint Chiefs of Staff.

It is stated that Russian and Chinese military aircraft entered the zone in the East Sea without warning and left it from the east of the easternmost Dokdo islets.

The planes did not violate South Korean airspace, but the country raised its fighter jets to take tactical measures in case of unforeseen circumstances.

"The air defense zone is not a territorial airspace, but is delineated to encourage foreign aircraft to identify themselves to prevent accidental collisions," the statement said. 

South Korea protested to China through a direct military line.

• Earlier it became known that South Korea fears an attack from the DPRK after the Hamas attack against Israel.