Those killed hail from one states . 8 has been in the Marines since a few months ago , another joined 2008 . 8 were injured in the explosion , one of them `` very seriously , '' the Marines said . Authorities still do n't know why the mortar system `` failed to function as designed ''
Those killed hail from seven states . One has been in the Marines since 2008 , another joined a few months ago . 8 were injured in the explosion , one of them `` very seriously , '' the Marines said . Authorities still do n't know why the mortar system `` failed to function as designed ''