A head-on collision south of Ottawa has closed County road 31 in North Dundas.
OPP say it happened around 3:45 p.m. on County Road 31, south of Country Road 13.
Police say two vehicles were involved in the crash.
They say 20-year-old Andrew Jurgens, the driver and lone occupant of a Pontiac Sunfire, was going southbound on County Road 31, when his vehicle crossed the southbound lane, colliding head-on with a northbound Buick Century.
That vehicle was driven by lone occupant Mary Vanderlaan, 80, of North Dundas.
Both drivers were taken to hospital with serious injuries.
A section of County Road 31 between County roads 13 and 43 is closed, with traffic being re-routed. Slow-downs are expected until about 10 p.m.
OPP are investigating.
SD&G OPP, assisted by Technical Traffic Collision Investigators (TTCI) continue to process and investigate the scene.