Wellington County OPP are investigating a pair of collisions south of Guelph, Ont., both of which occurred within hours of each other.
The first was on Maltby Road between Highway 6 and Victoria Road at around 10:30 a.m. Wednesday.
Const. Joshua Cunningham posted on Twitter that a sedan collided with a tractor trailer.
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He says the occupant of the sedan was airlifted to a trauma centre with non-life-threatening injuries.
The second collision occurred on Brock Road south of Clair Road involving a pedestrian sometime before 2 p.m.
Cunningham says the pedestrian was taken to a trauma centre with possible life-threatening injuries.
He says the affected roads are closed and motorists should take alternate routes.