A woman is recovering from eye injuries today, after she was hit in the face during an argument between two passengers on a Muni bus traveling down Market Street.

It was 4:33 p.m. Wednesday when a man in his mid-30s engaged in what police describe as a "verbal argument with another passenger" while riding a Muni bus on Market at Hyde Street.

As the argument escalated, the man hopped off the bus and "threw a butane canister at the other passenger" with whom he was arguing, according to the San Francisco Police Department.

His toss missed, however, and the canister instead hit another, uninvolved Muni patron in the face.

The victim of his untrue aim, a 59-year-old woman, suffered lacerations to her eye, police say. She was transported to San Francisco General Hospital for treatment of her injuries, which police say are not life-threatening.

The canister-thrower, who police are now seeking for what they term an aggravated assault, fled in an unknown direction. As of Thursday, he remains at large.