(Portland, OR)  --  Police are investigating an early-morning armed robbery in Northeast Portland.  Authorities say a man and a woman were sitting in a car on Northeast 11th Avenue and Sumner Street around 2:36 this morning when they were approached by two men, one of them with a gun, who robbed the victims of various items.  Police say as the robbers walked away, the gun was pointed at the vehicle and fired, but no one was injured.  Investigators say the suspects are described as two young black men.