A Chinese fighter jet came within about 150 feet of a Japanese naval reconnaissance plane over the weekend, the Japanese Defense Ministry said Thursday, an action the US ambassador to Tokyo called “dangerous” and “reckless.

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

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