Japanese Defense Minister Itsunori Onodera says a Chinese missile frigate locked its fire-control radar on a Japanese helicopter and destroyer in January in the East China Sea. China denies the claims. (Japanese Defense Ministry via Associated Press)

Japanese Defense Minister Itsunori Onodera says a Chinese missile frigate locked its fire-control radar on a Japanese helicopter and destroyer in January in the East China Sea. China denies the claims. (Japanese Defense Ministry via Associated Press)