Japan has protested after Chinese fighter jets locked radars on Japanese aircraft as tensions between the two nations worsened.
Locking radar onto an aircraft is considered a threat because it can signal a potential attack. Japan said there were two such incidents Saturday off its southern Okinawa islands.
Japan said it scrambled fighter jets in response to the Chinese J-15 fighter jets, while Beijing accused Tokyo of “harassing” its forces during a training exercise. No injuries or damage were reported.