Police believe impairment may be a factor in a multi-vehicle collision on Circle Drive during the Thursday morning rush hour.
It happened just after 8 a.m. in the eastbound lanes between Avenue C North and Idylwyld Drive, creating a traffic headache for drivers.
Saskatoon police said four vehicles were involved. One driver was taken to hospital as a precaution, police said.
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Traffic was restricted in both lanes while first responders were at the scene.
Those restrictions have been lifted.
Charges have yet to be laid as police continue to investigate.