SP03 Perfecto Sison of the Sual police told The STAR that the vans driver, Allan de Guzman, 30, and one of his passengers, George Gringo Rivera, 18, a student, were declared dead on arrival at the Alaminos Doctors Hospital.
Those wounded were identified as Jell Abarra, 28, a nurse at the Virgen Milagrosa Hospital in San Carlos City; Elizabeth Caaya, 60; and Ricky Catabay, 17, also a student.
Four other passengers were unhurt.
Investigation showed that the van was heading toward Alaminos City when it was fired at with M-16 Armalite rifles.
Police probers found 17 empty shells at the ambush scene.