An amphibious assault vehicle with 15 Marines inside burst into flames during a training exercise at Camp Pendleton, California on Wednesday, according to a source with knowledge of the incident.

Although the vehicle was engulfed in flames, all of the Marines were able to escape.

The source, who spoke on condition of anonymity since they were not authorized to talk with reporters, said that at least three Marines were taken by helicopter to local hospitals for burns and smoke inhalation.