A U.S. Air Force crew ejected from a B-1 bomber that ran violently aground during a Monday training flight, the Associated Press reported.
Each of the four personnel sustained "some injuries," according to a air service statement, which also noted the reason for the crash remained unknown.
The 28-year-old strategic aircraft slammed into a secluded area of southeastern Montana after departing from Ellsworth Air Force Base in North Dakota.
The base has suspended air missions pending a probe of the incident, said Col. Kevin Kennedy, who heads the facility's 28th Bomb Wing. The base hosts 27 additional B-1 bombers, which previously had a nuclear-weapons delivery role but now carry only conventional munitions.