A crash Monday afternoon in east Lambton sent one person to hospital.
Lambton OPP responded to a two-vehicle collision on Confederation Line in Watford at around 1:30 p.m.
Police said one person suffering from life-threatening injuries was air-lifted to hospital.
Confederation Line was closed to traffic between Stewardson Road and Bear Creek Crescent until shortly before 7 p.m.
Further details were not immediately available.