A 25-year-old man was arrested on suspicion of assault and vandalism during a brawl with a teenage girl on a Muni bus in Visitacion Valley Monday.
Police responded to a report of a fight on a bus near Bayshore Boulevard and Arleta Avenue about 4:15 p.m.
Officers located both the victim, a 17-year-old girl who had suffered a contusion on her forehead, and the suspect, identified Tuesday as San Francisco resident Gilberto Lopez-Duarte, Officer Gordon Shyy said.
The officers learned Lopez-Duarte and the teenager hadn't previously met but had gotten into an argument on the bus. Shyy said it became so heated that both parties spat upon each other.
At one point the 17-year-old went to the front of the bus and Lopez-Duarte followed. He "threatened to kill the victim" and then "smashed the bus window with a bottle," Shyy said
Lopez-Duarte then followed the teenager off the bus and "continued to threaten to kill the victim with the broken bottle," Shyy said.
Lopez-Duarte was arrested and booked on charges of assault with a deadly weapon, criminal threats and vandalism.
"He also had an outstanding warrant in Oakland for petty theft," Shyy said.
The teenager was reportedly treated at the scene for her injury and her parents were contacted.