Muni Metro service was suspended Friday morning after a light-rail vehicle struck a pedestrian between two underground stations.
The pedestrian had been walking on the outbound tracks somewhere between the Embarcadero and Montgomery stations at the time of the 5 a.m. collision, police said.
The condition of the pedestrian was not immediately known.
Bus shuttles provided supplemental service until about 9 a.m., when regular light-rail service resumed, according to Muni spokeswoman Kristen Holland.
Bay City News contributed to this report.