They also said criminal charges were likely.



The melee occurred on Sunday during a touch football game between high school girls in a park in a welltodo Chicago suburb. Seniors had invited juniors for what was described as an initiation into their senior year.



Videotaped by students and shown repeatedly on national television, the socalled "hazing" involved as many as 100 teenagers from Glenbrook North High. Five girls were hospitalised, including one who broke an ankle and another who suffered a cut that required 10 stitches in her head.



Local police said they will probably file criminal cheap nfl jerseys charges. Spokesman Steve Mayberry said he did not know the specific charges or how many people would be charged.



Northbrook Deputy Chief Michael Green said that police were investigating whether parents provided alcohol. According to school board member Tom Shaer, two parents might have supplied kegs of beer.



Police were also investigating whether a parent helped gather some of the faeces, Shaer said.



The students apparently arranged the event in secret, taking pains to make sure school administrators who suspected the girls were planning something did cheap nike nfl jerseys not find out the time and place.



"We have determined the kids had a network of mobile phones, pagers, text messages and internet instant messages to keep each other informed,'' Shaer said.



Some participants were not told of the time and location until an hour before, Glenbrook North Principal Michael Riggle said.



For years, students at the school of more than 2000 students have held a "powder puff'' football game each spring as a rite of passage for incoming seniors.



Shaer said in the past, administrators have been able to find out when and where the event was to take place in time to alert the police and prevent it from turning into the kind of melee that happened Sunday.



Zack Blum, a student who videotaped the event, said that the hazing after the football game used to be limited to girls dumping food on other girls. "People never got hurt before,'' he said.



Rollin Soskin, a lawyer for three girls who were beaten, said there was no indication that this year would be any different.



"They were told no physical pain would be inflicted, no hair cutting, they wouldn't be made to eat anything,'' he said. "They expected to get whipped cream, ketchup, syrup in their hair, that kind of stuff.''