A 20-year-old man was critically injured Thursday night in a moped crash on Nimitz Highway.

Police said the man is a member of the U.S. Coast Guard.

The crash happened about 11:25 p.m. at the intersection of Nimitz and Waiakamilo Road.

Police say the man was traveling west on Nimitz and had just crossed the intersection when he lost control of his moped and hit the curb.

The man, who was not wearing a helmet, was taken to The Queen's Medical Center in criticial condition.

Police say alcohol might have been a factor in the crash.