Gorny, 93 miles north of the border with Mongolia. Two of those killed were officers and the others were enlisted men. The two wounded soldiers reportedly were in serious condition. Russia’s Investigative Committee said it had opened a murder case against the suspect, whom it identified as 20-year-old Ramil Shamsutdinov. The Defense Ministry said the soldier apparently opened fire in a “nervous breakdown over personal problems unrelated to his military duties.”