An 86-year-old man was severely injured in a crash Thursday in Washington County.

The crash took place at around 10:42 a.m. on Route 4 near Needhamville Lane in the town of Fort Ann.

Upon arriving, deputies located Thomas S. O’Brien, who is from Clarendon, Vermont. O’Brien was extricated from the vehicle by members of the Fort Ann Fire Department, the Washington County Sheriff’s Office said in a news release on Friday.

He was then transported to nearby landing zone by Fort Ann EMS and then taken by medical helicopter to Albany Medical Center with severe head and facial injuries.

A preliminary investigation shows that O’Brien had been traveling north in his 2018 Volvo before the crash. A witness reported seeing O’Brien’s vehicle swerving before speeding up and leaving the roadway. Then, it rolled over and landed on its roof.

Police believe he may have had a medical issue before the crash or some other contributing factors.

Route 4 was closed for a time while the accident was cleared.