MOSCOW, May 13: 7-year-old Russian boy told investigators he had shot and killed his 4-year-old brother by accident with their grandfather’s rifle yesterday, law enforcement authorities said. The boy said he and his brother had found the gun under a bed in their grandparents’ house in the Siberian town of Bukachacha and were playing with it on the porch while the adults slept, the federal Investigative Committee said. (agencies)