Four armed robberies in four days have Regina police asking for the public's help in tracking down a knife-wielding suspect.

The first robbery occurred Feb. 12 at a gas station in the 4500 block of Albert Street. Police say a man with a knife entered the gas station, demanded money from the cashier, and then fled.

​The next day, a man robbed a bank in the 2700 block of Avonhurst Drive.

Similar robberies occurred on Feb. 14 at a restaurant in the 100 block of McDonald Street North and on Feb. 15 at a restaurant in the 300 block of Albert Street.

In each robbery, the suspect was described as a 6'0" white man, between the ages of 30 and 50, with a medium-to-heavy build and carrying a knife. During the Friday evening robbery, police say the suspect was wearing a black mask.

All four robberies took place in the evening, said police. No one was hurt in any of the holdups.

Anyone with information is asked to call the Regina Police Service at 306-777-6500 or Crime Stoppers at 1-800-222-8477.

Police also want to remind business owners and employees to be familiar with safety procedures in case of robbery, and to call 911 immediately for any emergency.