WASHINGTON (AP) — The Obama administration on Friday accused a Chinese fighter jet of conducting a “dangerous intercept” of a U.S. Navy surveillance and reconnaissance aircraft off the coast of China in international airspace — the fourth such incident since March.

The Pentagon press secretary, Rear Adm. John Kirby, said Washington protested to the Chinese military through diplomatic channels, calling the fighter pilot’s actions “unsafe and unprofessional.” And U.S. officials said this is at least the second formal complaint American diplomats have filed with the Chinese over these military actions in recent months.