A man was struck and killed by an out-of-service Caltrain heading south in a tunnel in San Francisco late Monday, a spokeswoman said.
The collision occurred in Tunnel One shortly after 9 p.m., Caltrain spokeswoman Jayme Ackemann said.
BART will continue to accept Caltrain tickets at Millbrae for passengers heading north to San Francisco, Caltrain officials said.
No further details were immediately available.