Japan and China are blaming each other after Tokyo raised concern that a Chinese fighter jet came dangerously close to Japanese reconnaissance planes.

The maneuvers over international waters in the Pacific last weekend prompted Japanese officials to warn China not to repeat them and risk a collision.

Chinese People’s Liberation Army Navy J-15 fighters came within 50 meters of a Japanese surveillance aircraft in what officials have called an “unusual maneuver,” announced this week. The fighter from aircraft carrier CNS Shandong (17) carried out the unusual maneuvers against Japan Maritime Self-Defense Force P-3C Orion Maritime Patrol Aircraft (MPA) over the Philippine Sea last weekend.