The alleged battery occurred at a bus depot next to the Rogers Park CTA Howard Red Line station at 7519 North Paulina Street, around 8:56 p.m., according to police dispatch reports.
The offender was described as a black male with blond hair, wearing brown, women's clothing, said police.
After the alleged battery, the suspect fled the scene on a southbound train at the Howard Red Line station, according to an eyewitness.
At 9:14 p.m., police stopped a possible suspect at the Jarvis Red Line station at 1523 West Jarvis Avenue.
According to authorities, the suspect admitted to being involved in an altercation on a CTA bus.
At 9:27 p.m., a witness, presumably the CTA bus driver, positively identified the suspect at the Jarvis "L" station as the person involved in the alleged bus depot attack.
The suspect was immediately arrested.