A B-52 Stratofortress bomber crashed shortly after takeoff at Edwards Air Force Base in Southern California on Sunday, killing all eight crew members aboard. Military officials described the crash site as "not survivable," and there were no reports of survivors. The cause of the crash is under investigation.

The aircraft went down during a test flight at Edwards, one of the U.S. Air Force's premier flight test installations located in the Mojave Desert northeast of Los Angeles. Edwards Air Force Base has a long history as a center for military aviation testing and has been the site of numerous historic flight milestones dating back decades.

The B-52 Stratofortress is a long-range, subsonic jet bomber that has been in service with the U.S. Air Force since the 1950s and remains a cornerstone of America's strategic bomber fleet. The aircraft regularly undergoes testing and modification programs to extend its operational capabilities. Edwards is a primary location for such test operations.

The Air Force confirmed the eight fatalities and said it was working to notify families of those killed before releasing their identities. Investigators from the Air Force Safety Center were expected to deploy to the crash site to begin determining the cause of the accident. No further details about the nature of the test flight or the specific variant of the aircraft involved were immediately available.

The crash represents a significant loss for the Air Force's bomber community. Officials offered condolences to the families of those killed and said a full investigation would be conducted. Edwards Air Force Base and surrounding areas were not reported to be at risk from the crash site.