A 26-year-old motorcyclist died in a single-vehicle crash in West Oahu Sunday.

Honolulu police said the motorcyclist was traveling southbound on Kunia Road and took the Kunia offramp at about 9 a.m. The motorcyclist was traveling at a “high rate of speed,” lost control at the turn and was thrown onto the roadway.

Honolulu Emergency Medical Services personnel treated the motorcyclist and took him in critical condition to a hospital where he later died. He was wearing a helmet at the time of the crash.

Police said speed was a factor. It’s unknown whether alcohol or drugs were factors.

This is the 24th traffic-related fatality on Oahu compared to 18 at the same time last year.