Janesville police are investigating an armed robbery at a drug store on the city’s north side. Police say four men and one woman entered the Walgreens at 1717 Milton Avenue about 6:00 a.m. Sunday. Officers say two of the men displayed hand guns and demanded to be taken to the safe and the pharmacy. The suspects got away with cash and drugs. They left on foot running west towards the Janesville Athletic Club. No employees were hurt.