Chicago Police Department investigators are actively searching for a suspect responsible for a violent assault aboard a Chicago Transit Authority train. The incident occurred on Tuesday evening, approximately around 10:40 p.m., on a Red Line train car. The attack took place near the Clark/Division stop, located within the Old Town neighborhood of Chicago. According to police reports, the suspect allegedly grabbed a female passenger, pulled her, and threw her to the ground. This violent act resulted in significant injuries, including multiple rib fractures sustained by the victim. Authorities have released surveillance images of the individual they wish to question and have classified the person as a wanted suspect. The CPD Public Transportation Division is urging the public to assist in the identification and apprehension of the suspect. Individuals who may have witnessed the incident or possess relevant information are asked to contact the Public Transportation Detectives immediately. Tips can be submitted by calling 312-745-4447 or by visiting CPDTIP.com to submit an anonymous tip. When submitting information online, the public is instructed to use the specific reference number JK423622 to ensure the report is properly linked to this case. Police emphasize the seriousness of the assault and the need for community cooperation in bringing the suspect to justice. The investigation remains ongoing as detectives review evidence and analyze the released surveillance footage to identify the individual responsible for the attack on public transit.