A man was severely injured when his vehicle collided with a tractor near Hebron Monday.

The man was driving a 2009 Honda Odyssey westbound on Thayer Road he it collided with the Ecolo-Tiger 875 disk ripper that was attached to a Case 620 tractor traveling eastbound, according to preliminary findings of the McHenry County Sheriff’s Office, which is investigating. The crash occurred about 8 p.m. Monday west of Route 47 and south of Hebron, the sheriff’s office said in a Tuesday news release.

The Honda driver, a Hebron man, 36, had to extricated from the severely damaged car and was taken to Northwestern Medicine Hospital McHenry, where he was listed in serious condition.

The tractor driver, a 78-year-old Hebron man, was uninjured, police said.

The Honda driver was not wearing a seatbelt, and alcohol is believed to be a factor in the crash, authorities said. The incident remains under investigation by the sheriff’s Major Crash Investigation Unit.

The sheriff’s office, McHenry County Conservation District Police, Hebron-Alden-Greenwood Fire Protection District, Woodstock Fire Protection District and Wonder Lake Fire Protection District all responded.