Police say around 1:50 p.m., a crash involving a car and a pickup truck happened at the intersection of Oxford Road 13 and Norwich Road.
Two adults and an 18-month-old baby were taken to hospital. One of the adults was later airlifted to a London-area hospital for further treatment.
OPP are now looking for the driver of the pickup truck, who reportedly fled westbound on Norwich Road after the collision.
Police describe the pickup truck as grey with a lift kit and say it will have front end damage.
The intersection at Oxford Road 13 and Norwich Road was closed for several hours but has since reopened.
The investigation is ongoing.
Police are asking anyone that may have dashcam or video surveillance footage to contact OPP investigators at 1-888-310-1122 or Crime Stoppers at 1-800-222-8477 (TIPS).
© 2021 Global News, a division of Corus Entertainment Inc.