NATCHEZ — Two Vidalia residents died and a third was airlifted for treatment after a single-vehicle wreck in Adams County Thursday.

Mitchell Williams, 22, and Sarah Ables, 28, died following the wreck on Providence Road.

Thomas Dotson, 25, of Vidalia, survived the collision but was airlifted to an Alexandria-area hospital following the wreck, Adams County Sheriff Chuck Mayfield said.

Mayfield said the wreck is under investigation but because there were no witnesses, it is difficult to know what happened.

What is known is that the 1999 Mercury Grand Marquis Williams crossed Providence Road at a high rate of speed, left the roadway and struck a tree head-on. Where the vehicle was going or coming from was not established Thursday.

“It is hard to tell if he was coming off of the Lewis Street Extension or from the south side of Providence Road,” Mayfield said.

Williams was the driver and Ables was the front-seat passenger. Dotson was in the back seat area of the vehicle, Mayfield said.

Williams’ family members have told investigators he had a history of seizures, Mayfield said.

“We think he seized and stiffened up, and when he did he hit the accelerator,” he said.

The Adams County Sheriff’s Office received a call about the wreck at 1:07 p.m.

Adams County Coroner James Lee said Williams and Ables were dead upon arrival of emergency crews. Lee said the two did not appear to have been wearing seat belts.

Williams and Ables had to be removed from the vehicle using the Natchez Fire Department’s extrication equipment, Mayfield said.

The Natchez Police Department also responded to the call.