Liu, a 16-year-old resident of San Lorenzo, was hit by a Union Pacific train around 8:05 a.m. at Grant and Railroad avenues and was pronounced dead at the scene.
The collision occurred near the campus of KIPP King Collegiate High School at 2005 Via Barrett, where Liu was a junior.
"The safety message here is that pedestrians, and everyone, need to be very aware of the hazards associated with trains and should never be on the train tracks or attempt to cross anywhere other than at a designated crossing when signs and signals permit," Union Pacific spokesman Justin Jacobs said in a statement.
Traffic backed up on Grant Ave waiting for railroad to separate the mile long train and reopen road. pic.twitter.com/5EKurFmqDf— Eric Thomas (@ericthomaskgo) May 3, 2017
Part of train that hit and killed a high school student in San Lorenzo. He may have been riding bike on trestle. pic.twitter.com/PuwcvECYVR— Eric Thomas (@ericthomaskgo) May 3, 2017