A San Francisco city supervisor says one person was killed and another was wounded in a shooting on a subway train Wednesday.

Supervisor Myrna Melgar says the San Francisco Police Department informed her that the shooting happened on a San Francisco Muni train between Forest Hill and Castro stations.

She says the perpetrator ran out of the train at the Castro station and remains at large. San Francisco police and city transportation officials did not immediately respond to telephone messages seeking more information.

No other details were released by police. Transportation officials said some routes are affected.