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

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.

Chinese fighter jets flew unusually close to Japanese military patrol planes over the Pacific last weekend, Tokyo said, after it spotted two Chinese aircraft carriers simultaneously deployed in the waters for the first time.