BART officials initially issued an advisory at 11:23 a.m. about a service disruption due to a "major medical emergency."
BART spokeswoman Anna Duckworth said shortly after noon that a person on the tracks was hit by a train, and that service was shut down in both directions between the two stations.
As of shortly before 1 p.m., Duckworth said limited service was resuming, with trains single-tracking through the area.
No update was immediately released on the condition of the person struck by the train.
A detailed BART service advisory has been issued: https://t.co/G8Clxd8beX— SFBARTalert (@SFBARTalert) December 10, 2018