LITCHFIELD – A Pennsylvania woman and her 3-year-old son were killed Saturday on the Maine Turnpike when their car rolled over several times while on the way to a family vacation, state police said.

Xantha Calsetta, 35, of Easton, Pa., and her son Cieroco Bearb, 3, were traveling to join relatives in Jonesport when Calsetta lost control of her car around 3:15 p.m., Trooper Duane Doughty said.

Witnesses saw the woman’s Mercury Mountaineer, driving north on the turnpike around mile 92 in Litchfield, drift to the right, Doughty said. She appeared to overcorrect, and the car rolled over three times before landing on its roof.

Calsetta, who was wearing a seat belt, was dead at the scene, he said, and Bearb, who was belted into a safety seat, did not have a pulse either, although emergency personnel tried to revive him on the way to Central Maine Medical Center in Lewiston.

“Most (young children) I’ve seen in serious accidents have been in safety seats, and they’ve been all right,” Doughty said. But the Mountaineer’s roof was crushed in the rollover, he explained.

Troopers were reconstructing the accident Saturday night, Doughty said. There was no indication Calsetta was speeding, or that alcohol was involved, but her blood will be tested as a procedural step related to the investigation, he said.

An Augusta man driving southbound on the turnpike hit a guardrail and totaled his 1995 Ford Escort station wagon when he saw Calsetta’s SUV careening toward him, Doughty said. “His first thought was she was going to hit him, so he swerved and hit the rail. He was reacting to what he was seeing,” Doughty said. Donell Newsome was treated and released at Central Maine Medical Center for minor cuts and bruises, he said.