Salt Lake County sheriff's detectives are investigating the weekend armed robbery of a drug counter at a grocery store.

Authorities said a man entered the Smith's pharmacy, 33rd South and Wasatch Boulevard, about 9:30 p.m. Saturday.The man, described as 6 feet tall and 25 years old, brandished a long-barreled handgun and ordered the clerk to hand over prescription pain killers. No money was demanded.