A B-52 bomber crashed shortly after take-off at a US Air Force base in California's Mojave desert, officials said.
Emergency crews were responding after the aircraft went down around 11:20 am (local time) at Edwards Air Force base, the military said on the social platform X.
There was no immediate information on whether anyone was hurt. A B-52 Stratofortress is typically crewed by five people.
Video from the scene showed a huge plume of black smoke rising from the desert.
Edwards, the vast desert base where Chuck Yeager broke the speed of sound in 1947, is about 161 km north of Los Angeles.
The crash comes almost a year after the pilot of a regional airliner flying over North Dakota last July made an unexpected sharp turn to avoid a possible midair collision with a military B-52 bomber that was in its flight path.
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