An 11-year-old girl drowned Sunday in Pokai Bay. The medical examiner identified the girl as Gloria Eram of Wahiawa.
Emergency medical officials said the girl was taken to the hospital where she later died.
Earlier Sunday, the girl's 9-year-old sister was taken to the hospital after a near-drowning in the same area. The sister is listed in serious but stable condition.
Authorities suspect that the 11-year-old girl was trying to help her little sister when the incident happened. The 11-year-old was found submerged in water a half hour after her sister was rushed to the hospital.
Their father was not at the scene.