One person has been seriously injured in a crash involving a horse-drawn buggy. Ontario Provincial Police were called to a collision at the intersection of Sideroad 3 West and Highway 6 south of Mount Forest just before 10 a.m. Police said the collision involved a vehicle and a horse-drawn buggy. The driver of the buggy was seriously injured, but police said they are in stable condition. The horse was also injured, but the extent of the injuries is unclear at this time. Emergency crews expected to be on scene for several hours. Highway 6 was closed between Sideroad 2 West and Sideroad 4. Sideroad 3 was also closed from Concession 11 to Concession 8 for the investigation.