At least 20 Marines were injured during a training exercise on the base at Twentynine Palms.
An official with the base naval hospital told NBC News, the Marines suffered from “inhalation exposure” during a large-scale, combined arms exercise on one of the training ranges of the base.
The official did not immediately say the condition of those injured but said there were no reported deaths.
On Jan. 24, a helicopter crashed during a training exercise on the base, killing two Marine Corps officers.
