Man trying to stop harassment of passenger stabbed on SF Muni bus

A Muni 14-Mission bus rolls by the intersection of Mission and Ninth streets early Tuesday, May 17, 2016, where hours earlier a man was stabbed in the torso during a confrontation aboard another Muni bus. A Muni 14-Mission bus rolls by the intersection of Mission and Ninth streets early Tuesday, May 17, 2016, where hours earlier a man was stabbed in the torso during a confrontation aboard another Muni bus. Photo: Bill Hutchinson / The Chronicle / / Photo: Bill Hutchinson / The Chronicle / / Image 1 of / 4 Caption Close Man trying to stop harassment of passenger stabbed on SF Muni bus 1 / 4 Back to Gallery

The actions of a Good Samaritan on an early-morning San Francisco Muni bus ride earned him a knife in the torso on Tuesday.

A man, according to his report to police, was attempting to intervene in the harassment and attempted assault of a fellow passenger on a Muni 14-Mission bus near Mission and Ninth streets when the assailant turned the attack on him.

The man was stabbed in the ribs at around 1:30 a.m. and his attacker fled the scene, said Sgt. Michael Andraychak, a spokesman for the San Francisco Police Department.

The 40-year-old victim, whose name was not released, was taken to a hospital with non-life-threatening injuries.

The victim told police he saw a man on the bus harassing another passenger, said Officer Albie Esparza, a San Francisco Police Department spokesman. The victim tried to intervene when he saw the man attempt to assault the other passenger and that’s when the attacker stabbed him, according to the victim’s report.

The victim got off the bus after being stabbed and waited for police to arrive.

No arrests have been made in the case.

The suspect was described as a 25- to 30-year-old black male, 6 foot 3 inches tall and 160 pounds, Esparza said. He was wearing a white beanie cap with thin black stripes, a red shirt and had a black or blue cloth covering half of his face.

Authorities are asking anyone with information to call the San Francisco Police Department anonymous tip line at (415) 575-4444 or to text a tip to TIP411 and begin the message with “SFPD”.

Kevin Schultz is a San Francisco Chronicle staff writer. Email: kschultz@sfchronicle.com Twitter: KevinEdSchultz