A man in his 20s died of multiple gunshot wounds after police found him in a Roxbury convenience store early Saturday morning. Police found the man in 24seven Convenience at 655 Warren St. about 4:30 a.m., Boston police said in a statement. A preliminary investigation indicates that the man was inside the store when the shooting occurred, said Officer James Kenneally. The victim was taken to Boston Medical Center, where he died of his injuries. Police did not immediately identify the man, Boston’s ninth homicide victim this year. Anyone with information about the shooting is asked to call Boston homicide detectives at 617-343-4470.