A Hiram man was seriously injured in a car crash that was likely caused by speed, alcohol and drugs, according to the Oxford County Sheriff’s Office.

Police say Shane Irish, 21, was injured in the crash late Thursday night and taken to Maine Medical Center in Portland. The crash occurred on Pequawket Trail near the Hiram-Baldwin town line.

The crash was reported to police around 10:30 p.m. Thursday by a passing motorist who noticed Irish’s crashed vehicle.

Police say Irish was traveling northbound on Pequawket Trail, crossed the centerline, went down an embankment and struck a tree. He was extricated from the car by members of the Hiram and Baldwin Fire Departments.

Irish was listed in serious condition Friday night at the Portland hospital.

Evidence at the scene suggests speed, alcohol and drugs contributed to the crash, according to police.

Pequawket Trail was closed for two hours after the crash was reported. The crash remains under investigation.