Officers were called to a reported crash involving a pedestrian on Mission Boulevard at Berry Avenue at around 10:20 p.m., according to the Hayward Police Department.
A woman in her 40s was apparently crossing the intersection in a crosswalk when she was struck and killed by a 29-year-old man driving home from California State University East Bay, police said. The motorist was not injured and stopped at the scene.
The driver voluntarily submitted to a blood test to determine if drugs or alcohol were in his system at the time of the crash. The driver's vehicle was in normal operating condition, police said.
A preliminary investigation suggested that the woman who was killed might have been under the influence of alcohol, police said. The Alameda County coroner's bureau was investigating and did not released her identity.
The southbound lanes of Mission Boulevard between Berry Avenue and Torrano Avenue were closed to traffic until about 2:30 a.m.
Anyone with information regarding the crash is asked to contact Hayward police Officer DeCosta at (510) 293-7099