Lanark County OPP are investigating a serious single-vehicle collision on Highway 7 in Drummond/North Elmsley.
Police say officers were called shortly before 2:20 a.m. Saturday, Aug. 15, after a passenger vehicle struck a tree near Drummond Concession 9A.
The lone occupant of the vehicle was ejected during the crash and taken to hospital with serious injuries.
The OPP Traffic Incident Management and Enforcement team is assisting Lanark County officers with the investigation.
Highway 7 was closed for several hours between Drummond Concession 9A and Gardiner Road while emergency crews worked at the scene and police gathered evidence.
The highway has since reopened to traffic.
Police have not released the name, age or hometown of the injured person.
No information has been provided on what may have caused the vehicle to leave the roadway.
The investigation remains active as officers work to determine the circumstances surrounding the crash.
The incident serves as a reminder of how quickly serious collisions can happen on rural highways, particularly during overnight hours.
