A man was hospitalized after a person attacked him Thursday night on a San Francisco Municipal Railway bus in the city's Mission District, police said.
The reportedly unprovoked attack happened around 8:05 p.m. on a 14-Mission bus near Mission and 19th streets, according to police.
After the attack other bus passengers helped push the male suspect off the bus, police said. The suspect then fled on foot.
The victim, a 29-year-old man, suffered injuries not considered life-threatening, police said.
A detailed description of the suspect was not available. Police were unable to apprehend him.