CBS/AP/ March 19, 2013, 10:11 PM

Pentagon bans 60mm mortar round after Marine deaths

Updated 10:11 p.m. ET

HAWTHORNE, Nev. A mortar shell explosion killed seven Marines and injured several more during mountain warfare training in Nevada's high desert, prompting the Pentagon to immediately halt the use of the weapons until an investigation can determine their safety, officials said Tuesday.

The explosion occurred Monday night at the Hawthorne Army Depot, a sprawling 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 Marines were practicing firing mortars, reports CBS affiliate KTVN-TV in Reno, when one of the rounds exploded while still inside the tube.

Brig. Gen. Jim Lukeman said investigators were trying to determine the cause of the malfunction.

The Pentagon expanded a temporary ban to prohibit the military from firing any 60 mm mortar rounds until the results of the investigation. The Marine Corps said Tuesday a "blanket suspension" of 60 mm mortars and associated firing tubes is in effect.

The Pentagon earlier had suspended use of all high-explosive and illumination mortar rounds that were in the same manufacturing lots as ones fired in Nevada.

It was not immediately clear whether more than a single round exploded, a Marine Corps official said, speaking on condition of anonymity because the official wasn't authorized to speak about an ongoing investigation.

The Marine Corps said early Tuesday that seven Marines were killed. Eight men under the age of 30 were taken to Renown Regional Medical Center in Reno. One of them died, four were in serious condition, two were in 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.

"We send our prayers and condolences to the families of Marines involved in this tragic incident," said the force's commander, Maj. Gen. Raymond C. Fox. "We mourn their loss, and it is with heavy hearts we remember their courage and sacrifice."

The rescue was complicated by the remoteness of the site, which is favored because the harsh geography simulates conditions in Afghanistan.

The 60 mm mortar is a weapon that traditionally requires three to four Marines to operate, but it's common during training for others to observe nearby. The firing tube is supported in a tripod-like design and fires roughly a 3-pound shell, some 14 inches in length and a bit larger than 2 inches in diameter.

The mortar has changed little since World War II and remains one of the simplest weapons to operate, which is why it is found at the lowest level of infantry units, said Joseph Trevithick, a mortar expert with Global Security.org.

"Basically, it's still a pipe and it's got a firing pin at the bottom," Trevithick said. Still, a number of things could go wrong, such as a fuse malfunction, a problem with the barrel's assembly, or a round prematurely detonating inside the tube, he said.

The Marine Corps official said an explosion at the point of firing in a training exercise could kill or maim anyone in or near the protective mortar pit and could concussively detonate any mortars stored nearby in a phenomenon known as "sympathetic detonation."

The official said a worldwide moratorium after such an accident is not unusual and would persist until the investigation determines that the weapon did not malfunction in ways that would hurt other Marines or that mortar shells manufactured at the same time as the one involved in the accident were safe.

The official said it would be normal to warn other U.S. military branches that use 60 mm mortars, such as the Army, about the Marines warning. The moratorium could last for weeks or months.

The investigation will focus on whether the Marines followed procedures to properly fire the weapon, or whether there was a malfunction in the firing device or in the explosive mortar shell itself, the official said.

The Hawthorne Army Depot stores and disposes of ammunition. The facility is made up of hundreds of buildings spread over more than 230 square miles, and bunkers dot the sagebrush-covered hills visible from the highway.


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77 Comments Add a Comment
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oldoc44 says:
So much glee over weapons - both military and civilian. Sounds like primitive cultures without any socialization skills or folkways/mores that decry violence and bloodshed.
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AllessioVentura replies:
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Except if somebody is gonna rape your mother, sister, or daughter after invading your home, I will bet everything I own that you would prefer to have an automatic or semi-automatic weapon at your disposal so you could blow the intruder's head off. And I'll bet dollars to donuts that you would prefer to have high capacity clips, like Obama's secret service does, so that you would rarely need to reload or insert another fully loaded cartridge. I am sure you are an Obama Zombie, but are you now pleading with him to tell his personal and family body guards to stop acting like "primitive" cultures do, and dispose of their automatic and semi-automatic weapons with large capacity cartridges? It must be that O has no "socialzation" skills since he allows his family's protective services to carry scary, powerful weapons that only "primitive cultures" might carry.
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ascpgh says:
What a ****** Reid is. If his association of this event and the sequester doesn't make it completely clear that politicians will say anything to bring support to their view, there is no greater example.

Last Friday Reid would have applauded seven dead military as eleven short of the number that has made America pull out of a theater of operations as proven by President (they don't need tanks there) Clinton in Mogadishu and repeated to American commanders in Bosnia. What will they retreat from in this case Harry, Nevada?
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jburkega says:
You can't legislate a psychopath, if the animal in Connecticut didn't have an assault rifle I can think of a dozen ways to be even more lethal! Like a car running through a playground during recess! Having a policeman at a school would deter idiots that see it as a target because of the 'GUN FREE ZONE"! BANKS ARE PROTECTED, COURTROOMS ARE PROTECTED, POLITICIANS ARE PROTECTED, WHY NOT OUR CHILDREN?
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doofus-slapper says:
"Pentagon bans 60mm mortar round"
Even cars and airplanes malfunction.
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Corvus_Rabiatus says:
Fuse failure. Normally, the fuse is designed to arm itself after having left the launch-tube and having traveled a nominally 'safe' distance. Apparently the fuse was already 'armed' and the shock of the projectile launch set it off. Sympathetic detonation of other ordnance at hand is possible, but greatly more likely if the fuses in them were in the same armed state.
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st247 replies:
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Corvus, seems plausible to me.
btw, your "handle" is interesting. Any translation, like rabid raven or something.
RIP to those deceased and condolences to all.
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alaskan_sol says:
Those damn Libtards keep taking away all our weapons and ignoring the second Amendment. What are we going to do when our Dictator in chief breaks down our door and takes away our Liberty. We need our weapons! Remember, Mortars don't kill people, people do.
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johneurope says:
Marines rest in Peace,

Yea it is all Obamas fault, see his first four is up so we have no one to blame but guess who? That is what he has done for the last four years balme some one else. AH the Buck stops at his desk????Only if it is good, bad must be Republicans Right>>>
Korea Vet i know the feeling, were you in the Chosin,Campagne frozen Chosin. It would tell me why you were firing a 60mm all by yourself or any where in the pull back. It was like 200 thousand Chinese charging in mass most times.
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rwsmith29456 says:
RIP marines. Poor guys, that is a terrible accident. I wonder which 60mm mortar had the problem? New one or old one? M224 or the A1 version?
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speakthetrut replies:
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It is the sequestered version.
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cobalt100 says:
Wu--it works! I told you it would. RV.
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LittleStream53 says:
Amazing! A 60mm mortar explodes, kills 7 men, the mortar is BANNED. 26 people, 20 of them children under the age of seven, and we can't even get assault weapons banned. This country is pathetic! No longer a leader! Too many congressmen on the take! Sad! So sad!
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Svlad-Cjelli replies:
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I'm in favor of weapons restrictions, however you are politicizing something that has nothing to do with your agenda. The military is suspending use of the 60mm as a precaution, to investigate a possible malfunction. Absolutely NOTHING about this relates to the assault weapons issue. "...no longer a leader" "...congressmen on the take" Calm the **** down.
dreggie replies:
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two people punched each other yesterday, and we can't get fists banned...shocking really
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