The Honolulu Medical Examiner is scheduled to conduct an autopsy Thursday on a Hawaii island man who was found face down on a sidewalk in the seaside area of Kailua-Kona.

Walter Kamana, 52, was found badly injured and unconscious near the sea wall along Alii Drive.

Kamana was found at 5:55 a.m. Tuesday by patrol officers conducting routine checks near the Kailua pier, Hawaii County police said.

He was taken to Kona Community Hospital with a head injury and later moved in critical condition to the Queen’s Medical Center on Oahu.

Kamana was pronounced dead at Queen’s at 9:16 a.m. Wednesday.

Police initially classified Kamana’s case as an assault and may reclassify it in light of his death.

Hawaii police said the death was being investigated.

Police are looking for witnesses, including canoe paddlers in the area who may have seen the incident.

Police ask anyone with any information about the circumstances of his death to call the police department’s nonemergency line, 935-3311, or Detective Shawn Tingle, 326-4646, ext. 277, or stingle@co.hawaii.hi.us.

Tipsters who prefer to remain anonymous may call the islandwide CrimeStoppers number, 961-8300, and may be eligible for a reward of up to $1,000.