A Chinese military helicopter performed an “unsafe and unprofessional” maneuver that forced an Australian naval aircraft to take evasive action during a North Korea sanctions monitoring mission in the Yellow Sea last week, according to Canberra’s defense ministry.

In a press release issued Friday, the Department of Defence said a People’s Liberation Army (PLA) Navy helicopter “intercepted” an Australian MH-60R helicopter launched from the HMAS Toowoomba frigate on Wednesday.

According to Canberra, the Chinese helicopter matched the Australian aircraft’s altitude before closing in to an unsafe distance, then moved slightly ahead, increased speed and rolled toward it, forcing the Australian