A commenter at CBS5.com said he or she saw the brawl that went down at the Embarcadero Muni station last night, and that the station agent was attacked:

I was there and saw the whole situation go down! The muni ticket agent was being attacked by the two fair riders and was trying to call the police to end the situation. The attackers (fair riders) were opening the door to his enclosed ticketing area, physically punching him and throwing soda cans at him. He was out numbered and overwhelmed by the attack. He was trying to get away from them and they kept attacking him. They are at fault, not him! This is a sad case of the state of our youth... he was the victim here! Arrest the two girls not him!

This is just one person's account, but it seems to be the predominate one.

Will the sisters face charges, as well? Seems they just might be in order.