Six people are being questioned in connection with the attack and robbery of a teenager that was caught on tape and posted on You Tube, police said.
No charges have been filed, according to Chicago Police News Affairs.
Police say a 17-year-old male was beaten and robbed at about 4 p.m. Sunday in an alley behind James Ward Elementary School at 28th and Princeton.
The video shows five males kicking and punching the victim while taunting him with racial slurs.
Police said Tuesday in a statement the incident does not appear racially motivated.
The victim was eventually able to run away. He was taken to a local hospital where he was treated and released.
Mayor Rahm Emanuel in an unrelated press conference wouldn't comment on the police investigation, but he said the incident should be "a wake-up call to all of us."
"It is not tolerable, and it does not represent what this city's values are and the good people of this city," Emanuel said.
He was robbed of his gym shoes and wallet, according to police.
CPS officials told NBC 5 that they are in touch with their safety and security team and aren't sure whether the victim or his attackers are CPS students.