Charlottetown Police are investigating an armed robbery that occurred just before 2 a.m. Tuesday on Grafton Street. A man and woman were walking on the sidewalk when they were approached by three men. One of them grabbed the man from behind. A scuffle resulted and the victim was cut on the finger with a knife. He dropped his cellphone which was stolen by the suspects who took off toward Pownal Street. Police say the case is ongoing if you have any information to call them or call PEI Crime Stoppers.