RPS said several police units were called to a report of a robbery in progress on Tuesday around 7:15 p.m.
The incident occurred at a business in the 4700 block of Gordon Road in the city’s Harbour Landing neighbourhood.
Preliminary investigation indicates a man was armed with what was believed to be a firearm, and entered the business pointing the gun at two workers, demanding money.
The suspect got an undisclosed amount of cash and ran outside. The store employees were not physically harmed.
Police believe he got into a red vehicle which had two girls inside, who had entered the business earlier.
The two girls were arrested on Wednesday. They cannot be named in accordance with the provisions of the Youth Criminal Justice Act.
They have been released and will make their next court appearance in Youth Court on Dec. 6.
Police are still looking for the third suspect who is described as about 20 to 25 years old, about six-feet tall, weighing about 190 lbs with brown eyes and black hair. He was wearing his hair in short braids or dreads with white tips.
He was wearing a loose grey sweatshirt and faded jeans at the time of the incident.
Anyone with information that could help police in this investigation is asked to contact RPS at 306-777-6500 or Regina Crime Stoppers at 1-800-222-TIPS (8477).