Honolulu fire officials say a 52-year-old Japanese tourist has been found dead in shallow waters off Kahala Beach.

Honolulu Fire Capt. Tyler Chan said the woman found early Monday appears to have drowned, but investigators are still trying to determine exactly what happened.

Chan says a friend of the woman called emergency officials about 4:30 a.m. Monday, saying the woman had gone for a swim overnight but didn’t return.

Chan says the woman was found about two hours later in shallow waters about 150 to 200 yards offshore.

Chan says a rescue swimmer recovered the woman, who showed no signs of life.