The Royal Newfoundland Constabulary is dealing with three robberies in less than 24 hours, including one at a pharmacy.
A man stole some narcotics on Tuesday when he held up Parkside Pharmacy on Mount Cashel Road, in the city's east end, around 12:30 p.m.
Police are not saying how many pills were stolen, or what weapon the thief used to get them.
"The RNC is concerned about the types of prescription drugs stolen and consider their potential availability on the street to be a public safety concern," the force said in a statement.
Around 7:45 p.m., a man held up a Needs Convenience store on Newfoundland Drive. Police noted that no weapon was visible during the incident.
The suspect fled the scene on foot.
Shortly after midnight, two people held up the Ultramar gas station on Kenmount Road. Police said the pair used an "edged weapon" in the robbery, which yielded cash and other items.
The robbers were last seen headed toward the nearby Avalon Mall.