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

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.

Japan and China blamed each other on Thursday after Tokyo raised concern that a Chinese fighter jet came dangerously close to Japanese reconnaissance planes. The Chinese fighter jets took off from one of two Chinese aircraft carriers that were operating together for the first time in the Pacific,