The cause of a March 18 mortar malfunction that killed seven Marines and injured eight other servicemembers in Hawthorne remains under investigation.
The First Battalion, Ninth Marine Regiment, held a private memorial service earlier today at Camp Lejeune, N.C., for the seven Marines killed in the training.
The service was attended by the members of the unit and families of the deceased.
The names of the fallen Marines are Pfc. Joshua M. Martino, 19, of Clearfield, Pa.; Lance Cpl. David P. Fenn II, 20, of Polk City, Fla.; Lance Cpl. Roger W. Muchnick Jr., 23, of Fairfield, Conn.; Lance Cpl. …