HAWTHORNE, Nev. — A mortar shell explosion killed seven Marines and injured a half-dozen more during mountain warfare training in Nevada’s high desert, prompting the Pentagon to immediately halt the use of some of the weapons worldwide until an investigation can determine their safety, officials said Tuesday.
The explosion occurred Monday night at the Hawthorne Army Depot, a facility used by troops heading overseas, during an exercise involving the 2nd Marine Expeditionary Force from Camp Lejeune, N.C. Several Marines from the unit were injured in the blast, authorities said.
The mortar round exploded in its firing tube during the exercise, said Brigadier General Jim Lukeman at a news conference at Camp Lejeune. He said investigators are trying to determine the cause of the malfunction.
Lukeman extended condolences to the families of the victims. “Our first priority is to provide them support and we’re doing that now,” he said.
The Marine Corps said in a statement that it suspended all use of high-explosive and illumination mortar rounds that were in the same manufacturing lots as the ones that were fired in Nevada. The Pentagon suspended use of those rounds worldwide across all branches, not just the Marines.
The Marines were also considering a stop-usage order affecting the mortar tubes like the ones in the accident.
It was not immediately clear whether more than a single round exploded, a Marine Corps official said, speaking on condition of anonymity.
Eight men under the age of 30 were taken to Renown Regional Medical Center in Reno with injuries, such as penetrating trauma, fractures and vascular injuries. One of them died, five were in serious condition, one in was fair condition and another was discharged, said spokesman Mark Earnest.
The identities of those killed won’t be released until 24 hours after their families are notified.