Around 5 a.m. below ground on Market Street, a light-rail vehicle struck a pedestrian walking outbound between the Embarcadero and Montgomery light-rail stations in the metro system's lower level, according to police.
The pedestrian was taken to San Francisco General Hospital. Police said the victim's condition was not immediately available.
Bus shuttles have been put in place for all lines between the Embarcadero and West Portal Metro stations, according to the San Francisco Municipal Transportation Agency Twitter account this morning.
Passengers traveling inbound on the K, L and M lines can take the subway to Van Ness and transfer to a bus shuttle to continue to the Embarcadero.
Riders on inbound N and J trains can catch shuttles at Church Street and Duboce Avenue, according to the SFMTA.