The Royal Newfoundland Constabulary is investigating several armed robberies where women have been involved.
On Wednesday afternoon, a 23-year-old woman was arrested at the Shoppers Drug Mart on Lemarchant Road.
Police said she was armed with a weapon and demanded drugs.
Police are also investigating whether another woman is responsible for two other recent armed robberies.
About 3 p.m. on Tuesday, a woman went into the Esso gas station on Torbay Road in St. John's and demanded money.
Then at about 5:10 p.m., a woman went into a Marie's Mini Mart near Octagon Pond in Paradise and also demanded money.
Incidents could be linked, say police
The RNC said the incidents could be linked because both times the woman is described as being blonde, five feet five inches tall, 120 pounds, and wearing a black jacket and black pants.
Both times, the thief was armed, but the police aren't saying with what, and police said both robberies were unsuccessful.
However, RNC Const. Nadia Churchill said police have been taking the incidents very seriously.
"Store clerks work behind those counters, and armed robberies can be very traumatic for the people involved," said Churchill. "It is a violent crime, so it does cause concern for the RNC."
Police have also been investigating whether these incidents are linked to an armed robbery in St. John's last week where a woman of similar description went into a Marie's Mini Mart, demanded money, and left empty handed.