A Muni bus rider was left with wounds to the face Tuesday, when a mugging team assaulted him and stole his cell phone.

It was a brazen mid-morning attack, police say, at 10:30 a.m. Tuesday on a Muni bus near 30th and Mission Streets. According to a report from the San Francisco Police Department, the 34-year-old male victim was seated on the bus "while holding his cellular phone in his hand."

Police say that a male suspect aged between 18-20 then distracted the victim from the front, saying "something unknown" as a second male suspect, aged 25-30, "approached from behind."

That second man, police say, then struck the Muni rider "over his head with a bottle and stole his cellular phone."

The thieves then fled in an "unknown direction," police say, and the victim was left with a non-life-threatening bloody nose.

As of Wednesday morning, the bus menacing bottle bashers remain at large, and no arrests have been made in the case.