Army investigators have opened a criminal investigation into a one-vehicle accident on post that killed a Schofield Barracks soldier and injured three others early Saturday, officials said.

The dead soldier, Spc. Phillip S. Bullins, 23, of Carthage, N.C., was a passenger in the vehicle that crashed on Kolekole Pass, according to the Army. Three injured soldiers, two men and a woman, all 19, went to the Queen’s Medical Center in serious condition, an Emergency Medical Services supervisor previously said.

Paramedics responded to a crash on base at 12:41 a.m. Saturday. At least two people were ejected from a vehicle that rolled over into an embankment, an EMS official said.