Updated at 10:50pm:
One person had to be airlifted to a London hospital with life threatening injuries after a head on crash north of Chatsworth this morning.
Police responded to the crash on Hwy 6 and 10 between Sunny Valley Rd and Grey Rd 18 just after 11am.
Two cars collided head on.
Grey County OPP and the OPP's Technical Traffic Collision team were on scene investigating.