A man has died after reportedly being attacked by a shark in Hawaii.

The 65-year-old from California was killed after being bitten by the animal, Hawaii NewsNow reports.

First responders are said to have performed CPR on the man but he was unresponsive.

Authorities say shark warning signs were being posted in the Ka'anapali Beach Park area on the Hawaii island of Maui.

The victim's name has not been released.