VANCEBORO, Maine — Speed and alcohol are believed to be factors in a one-vehicle crash that injured four young men, one seriously, on Saturday.

The Washington County Sheriff’s Office received a 911 call about the Route 6 crash at approximately 1:30 a.m. Saturday, according to a news release issued Monday.

The first deputy to arrive found a red 2004 Saturn that appeared to have rolled over and Ryan Dyer, 22, who had been ejected from the car, lying in a ditch, breathing but unresponsive, according to the release. LifeFlight was contacted to fly him to a Bangor hospital.

During the course of the investigation, it was determined that three other people had been in the car with Dyer. Two of those three also apparently had been ejected, one of whom — a 16-year-old — may have suffered fractured ribs, according to the release. All three, however, had left the scene before officers arrived.

Police eventually caught up with the three and the 16-year-old also was taken by LifeFlight to a hospital, according to the release.

The other two occupants, a 17-year-old boy and Jon Moore, 21, were taken to Calais Regional Hospital for treatment of minor injuries, police reported.

The accident remains under investigation and charges are anticipated, according to the release.

No other information was available and calls to the sheriff’s office Monday were not immediately returned.