BURLINGAME, Calif. -- The San Mateo County coroner's office has released the name of a teenage boy killed Saturday morning when he was fatally struck by a Caltrain in Millbrae.
Max Heffernan, of Burlingame, was 15 years old. He was struck at about 9:10 a.m. Saturday about a mile south of the Millbrae station, Caltrain officials said.
On Saturday morning, Heffernan posted an Instagram photo of himself buckled into the driver's side of a vehicle, indicating that he was headed to Utah for a month.
Friends on social media remembered him as a talented rider of BMX bicycles. His YouTube channel, Max Heff BMX Productions, had several videos documenting Heffernan riding and performing tricks.
More than 720 passengers were aboard the Caltrain when it struck Heffernan. For more than an hour, trains were not permitted to operate near the scene of the crash.
The cause of Heffernan's death will be determined by the coroner. Caltrain spokeswoman Christine Dunn said suicide is being looked at as a possible factor.