It's not yet confirmed. It appears this may have been the projectile that may have been kicked by passing traffic. pic.twitter.com/lyjGadKvr0 — CHP RWC (@CHP_RedwoodCity) September 17, 2016

.@CHP_RedwoodCity says projectile that killed an elderly driver on NB101 was a large brass bolt. — Katie Marzullo (@KatieABC7) September 16, 2016

Man in his 80s from Mt. View killed on NB101 in #PaloAlto after projectile came through windshield & hit him in the neck. @CHP_RedwoodCity — Katie Marzullo (@KatieABC7) September 16, 2016

PALO ALTO, Calif. (KGO) -- An elderly man in his early 80s, who lived in Mountain View, was struck in the neck and killed by a possible projectile. CHP officers believe it may have been a large brass bolt that was about the size of a softball, but their investigation is still on-going.CHP officers say the bolt may have fallen off a vehicle, or been kicked up from the road.The object hit the driver, who was driving northbound on U.S. Highway 101 in Palo Alto Friday afternoon.Witnesses said the man, who appears to be in his early 80s, was struck by the item when it smashed through his windshield near Willow Road at about 1 p.m., said CHP Officer Art Montiel.Drivers stopped to assist the man, but the driver died at the scene.After being struck, the driver collided with the center divide, eventually coming to a stop. No other vehicles were involved in the accident.