The U.S. said Thursday that two Chinese SU-30 jets conducted an “unprofessional” maneuver over international airspace above the East China Sea.
An Air Force spokeswoman told Reuters that “the issue is being addressed with China through appropriate diplomatic and military channels.
The U.S. crew aboard the WC-135 Constant Phoenix aircraft relayed details about the encounter. The move was considered “unprofessional” due to the distance between planes and their speed.
The WC-135 aircraft is specifically designed to collect data about possible nuclear explosions, Bloomberg reported.