Three teenagers have been charged with beating to death 16-year-old Derrion Albert, an "innocent bystander" who walked into the middle of a street fight between two groups of feuding teens last Thursday, according to prosecutors.

Prosecutors said the fight -- with teens punching and kicking and swinging two-by-fours -- was related to a shooting outside Fenger earlier that day. 

At the teens' bond hearing this afternoon, a Cook County prosecutor said Albert was beaten by teens from both sides of the feud, which simmering rivalry between two groups of Fenger students, one that lived near the school and the other from the Altgeld Gardens housing development.

Carson, who was allegedly from the faction near Fenger, was the first to hit Albert with a railroad tie, according to Assistant State's Atty. Jodi Peterson.

As Albert struggled to stand up and escape the melee, Riley also hit him with a railroad tie and Shannon repeatedly stomped on his head, the prosecutor said. Both Riley and Shannon allegedly belonged to a separate faction that lived in or near Altgeld Gardens.

Records showed Carson is on probation for a robbery conviction. Shannon and Riley have no criminal records