PALMYRA — A 21-year-old Lewiston man died Tuesday after his vehicle veered off Interstate 95 through a guardrail and several other vehicles struck the damaged guardrail, causing further crashes around mile marker 155 in the northbound lanes, state police said Wednesday.

Shortly before 9:30 p.m. Tuesday, the Bangor Regional Communication Center received an automated crash notification near mile marker 155, followed by several calls from motorists with reports that a portion of the guardrail was in the northbound travel lands and that a vehicle appeared to be in the median.

An initial investigation has shown that a white Toyota 4Runner went off the roadway to the left, striking the guardrail and rolling several times until it came to a rest in the median, Shannon Moss, public information officer for the Maine Department of Safety, wrote in a news release issued Wednesday.

Isaac Lemieux, who was driving the Toyota, was pronounced dead at the scene. Lemieux was not wearing a seat belt and speed and alcohol are believed to be factors in the crash, the release said.

Several other northbound vehicles struck the guardrail that was in the passing lane, causing further crashes, with only some minor injuries reported.

The crash remains under investigation.

Maine State Police were helped at the scene by Newport Fire and Rescue, the Maine Department of Transportation and Blanchard’s Towing.