A man was critically injured early yesterday in a single-vehicle accident on Maui.

The 27-year-old driver of a 1997 Ford Explorer was southbound on Baldwin Avenue in Makawao when the sport-utility vehicle ran off the road and hit a tree at about 12:44 a.m., police said. The driver was taken to Maui Memorial Medical Center in critical condition.

It was unknown whether speed, drugs or alcohol were involved.