Two people remain in critical condition following a head on crash just southwest of Alliston.
OPP say around 8:30 Sunday morning, a northbound and a southbound vehicle collided on Concession Road 5, south of the 25th Sideroad in Adjala-Tosorontio.
The 23 year old male driver and 18 year old female passenger of the southbound vehicle were airlifted to a Toronto hospital with life-threatening injuries.
The other driver, an 81 year old man was transported to a local hospital and treated for non-life threatening injuries.
The investigation into the cause of the crash continues.
