Five men have been attacking and robbing CTA red and blue line riders on walkways. All five of the offenders appear to be young men between 18 and 25 years old. And thanks to CTA surveillance, we have photos of what they look like. Police believe they have been attacking people and getting away with people's belongings, hitting, and holding people at gun point to get their way. Three robberies have happened over the last month. If you know anything, police are encouraging you to come forward and say something.