This happened on Sunday morning near the intersection of Ocean and Junipero Serra. The bus has since been removed from the K-Ingleside tracks. Streetsblog got this photo via a tip. It's unclear how the bus ended up on the tracks. Paul Rose, a spokesman for SFMTA, only said that, "The operator of the bus drove on the tracks at that location. We had to get a tow truck to remove it. Shuttles provided service through the area to West Portal."
For those not familiar with the intersection, the K-Ingleside train runs on streetcar tracks on Ocean, and then continues on regular train tracks after the station on Junipero Serra. It's tempting to speculate how a bus driver, especially if he normally drives a light-rail vehicle, could make this mistake.
Streetsblog will update this post when it has more information. In the meantime, if any readers were on the bus or saw the incident, please leave a comment below.