The helicopter, part of Operation Resolute Support, crashed in what the ministry and NATO called an accident at the mission's Kabul headquarters about 4:15 p.m. local time (7:45 a.m. ET).
No other details were made available, including the nationalities of the others involved or the precise circumstances of the crash, which crash came the same day a suicide car bomb struck a convoy of coalition forces in Kabul. The number and nature of the casualties remained unknown late Sunday.
About 12,500 NATO personnel are in Afghanistan as part of the mission to support and train Afghan security forces.
Courtney Kube is a correspondent covering national security and the military for the NBC News Investigative Unit.
Alex Johnson is a senior writer for NBC News covering general news and technology and religion. He is based in Los Angeles.