Police investigating an early-morning stabbing in Portland say the victim is not cooperating. Police say the man walked into a Forest Avenue convenience store at about 2 a.m. Wednesday and asked a clerk to call an ambulance. Authorities say the victim was taken to Maine Medical Center with ten stab wounds to his back. His injuries are not considered life-threatening. The victim’s name was not immediately made public and there was no word on arrests. Police say he will not tell them what happened.