Four men were injured, one critically, in an early-morning, single-car crash near mile marker 21 on Kauai’s Kaumualii Highway.

The crash occurred at about 2:45 a.m. near Pakala Village, according to Kauai police.

A Range Rover occupied by four men was heading east on Kaumualii Highway when it apparently crossed the centerline, over-corrected back to the eastbound lane and struck a guardrail, according to a preliminary police investigation. The vehicle flipped over the guardrail, and tumbled, eventually landing on the passenger side against a utility pole.

Police said the front-seat passenger was medevaced to Oahu with critical injuries to his back and head; the driver suffered non-life-threatening injuries and is being treated at Wilcox Hospital; and two rear-seat passengers had non-life-threatening injuries.

Police closed both lanes of Kaumualii Highway as they responded and investigated. The lanes were reopened at about 8:30 a.m. Kauai County officials said the long closure was due to the severity of the accident and the difficulty in removing the vehicle, which required a crane to lift it from its precarious position.