The investigation into the death of a 28-year-old pregnant woman who died Friday night after apparently falling out of the passenger side of a pickup truck on Kamehameha Highway in Punalu'u has been turned over to the homicide unit, police said yesterday.

The woman was identified as Delphine Haina from Wai'anae. An autopsy will be performed today. No arrests have been made in the case.

The accident happened about 8:30 p.m. on Friday as the truck was traveling north at about 35 mph near 53-627 Kamehameha Highway. Police said Haina and her boyfriend, who was driving the blue Chevrolet truck, were arguing just before her fatal fall from the truck's cab.

Haina was taken to Kahuku Hospital in critical condition and then airlifted to The Queen's Medical Center, where she died.

Other autopsies are scheduled today for Ariel Aki, 15, and John Kelly Etrata, 24, both of Lana'i City.

Aki and Etrata were found dead Saturday after an apparent murder-suicide, police said.

The missing 15-year-old girl and the 24-year-old man she had been dating for about a year were found dead in a field about a mile from the Lana'i Police Station.

Police released no further details in either case.