A 33-year-old Canadian visitor, taken to the hospital in critical condition Thursday after being found face down off Kuhio Beach, near the Duke Kahanamoku statue, has died.

The Medical Examiner’s Office identified the victim as Mark Gaborro, of Alberta, Canada.

Police classified the case as an unattended death, pending the outcome of an autopsy.

Emergency Medical Services said Gaborro had been surfing at Waikiki Beach Thursday when he was found 75 yards off shore around noon.

Gaborro’s surfboard leash was detached from his ankle, EMS reported.

A high surf advisory was in effect on south shore beaches Thursday where 6- to 8-foot waves were expected.