More than ten Chinese and Russian military aircraft entered South Korea’s Air Defense Identification Zone (KADIZ) on Saturday, prompting Seoul to deploy fighter jets as a precaution, according to the South Korean Joint Chiefs of Staff. The aircraft flew over the East Sea and South Sea before leaving the zone, and no violation of South Korea’s sovereign airspace was reported.

The air defense identification zone is not considered sovereign airspace but a surveillance area where incoming aircraft are identified for security reasons. Normally, foreign military aircraft are expected to notify the relevant country before entering such zones, though this is not legally mandatory. China and Russia did not immediately comment on the incident.

The event underscores ongoing regional military activity involving China and Russia near the Korean Peninsula, though no direct confrontation or breach of airspace occurred.