Mounties were patrolling on 1st Street South when they spotted three known individuals on bicycles at around 3 a.m. on Tuesday.
Believing they were trafficking drugs, police approached the trio, who immediately took off on their bikes.
Officers ran after the group and caught a 21-year-old Saskatoon man while the others got away.
RCMP say a search of the suspect’s backpack turned up a sawed-off shotgun, a handgun, bear spray and break-in tools.
The suspect was put behind bars and faces a several charges.
Police are looking for the remaining suspects –a 24-year-old man and 30-year-old man, both from Dauphin.
Anyone with information is asked to contact Crime Stoppers at 1-800-222-8477.
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