Canada Border Services Agency officers at the North Portal border crossing notified the RCMP at 3:30 p.m. CT after the suspected explosive device was found in the 21-year-old Toronto man's vehicle.
The Mounties said in a release that the man was arrested as the Explosive Disposal Unit investigated, later detonating the pipe bomb at 8:30 p.m.
Throughout the ordeal, traffic was allowed to move vehicles freely across the border except for a period of 15 minutes when the detonation occurred.
RCMP investigators said they don't believe the incident is related to any terrorist or organized crime group.
The unidentified man is charged with possession of an explosive device. He is scheduled to make his first court appearance in an Estevan court on Tuesday.
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