A pedestrian was struck and killed by an unidentified vehicle early Tuesday morning in Fairfield, prompting a police investigation. The incident occurred around 1 a.m. on Air Base Parkway near Wylie Lane, where a Fairfield police officer discovered the victim lying on the shoulder. The victim, whose identity has not been released, succumbed to their injuries at the scene. The traffic unit is actively investigating the collision and seeking to locate the hit-and-run vehicle and its driver. Air Base Parkway was closed for approximately six hours while investigators processed the area. Anyone with information regarding the incident is urged to contact the Fairfield Police Department.