Person found shot on CTA Red Line train in critical condition

CHICAGO - A male victim was shot while standing on the CTA Red Line platform in Fuller Park early Thursday morning. 

The victim told responding officers that he was inside a train car when he was shot by someone he didn't know. 

Police responded to the 200 block of West Garfield Boulevard around midnight to investigate. 

Security footage showed the victim shot on the platform and then fell into the train car. Police say the video also shows two groups of people arguing before the incident. 

The victim refused to offer up any more information about the incident. 

He was transported to University of Chicago Medical Center in critical condition. 

No arrests have been reported.