A Ledyard couple in their 60s from Ledyard was injured when their car rolled over on Center Groton Road, Route 117, near the Groton Town line just before 2:30 p.m. on Friday.
The driver, David Doucette, 67, was transported to the Lawrence & Memorial Hospital to be treated for injuries and the passenger, Betty Doucette, 63, was taken to the hospital to be treated for serious injuries, according to police.
Police said a Connecticut Light & Power support pole and fire hydrant were damaged.
The Ledyard Police Department Accident Reconstruction Team is investigating.
This crash closed Route 117 for approximately one hour.