ROXBURY – Three Lewiston residents and a Portland man were injured when their car slammed head-on into a bridge abutment Sunday afternoon on Route 17.

The four were identified by state police as 27-year-old Jason Hanson, who was driving, 21-year-old Chad Roberts and 20-year-old Chantelle Breton, all of Lewiston; and 26-year-old Stephen Didonato of Portland.

Didonato was listed in critical condition Monday night at Central Maine Medical Center in Lewiston, a nursing supervisor said. Hanson and Roberts were both in serious condition, the supervisor said.

Breton was treated at Rumford Hospital and released, Maine State Police spokesman Stephen McCausland said.

Hanson was driving north to Coos Canyon in Byron, where the four were going swimming at the popular state picnic area on the Swift River, he said.

The accident occurred about 2:40 p.m. when Hanson lost control of the 1996 Saturn on a curve. The car hit a guardrail and a bridge abutment, flipped at least twice and landed on top of the guardrail on the opposite side of the highway.

Hanson and Didonato where thrown from the car, he said.

Med-Care Director Dean Milligan, who responded with four other Med-Care paramedics in four ambulances, said two people were trapped in the wreckage. Rumford firefighters “had to cut the whole car apart to get them out,” he said.

“It looked like they went off the edge of the road, struck the bridge abutment, went across the road, hit the guardrail on the other side, and flipped up over the guardrail,” Milligan said.

One person was flown to the Lewiston hospital and the other two taken by ambulance after first being evaluated at Rumford Hospital.

Maine State Police Trooper Kyle Tilsley is investigating the accident on the newly paved road, which was wet at the time. Hanson was apparently unfamiliar with the highway, McCausland said.