The Haliburton Highlands O.P.P. is investigating a multi-vehicle crash that left two people with seriously injuries.

The crash happened in Gooderham just before 6:00 p.m. on Monday at the intersection of County Road 507 and County Road 503.

The driver of a Honda Civic turned onto County Road 503 and collided with an eastbound Mazda.

The crash caused the Mazda to collide with a G.M.C. Yukon.

The 21-year-old driver of the Yukon and an 86-year-old passenger were taken to hospital.