Published: Apr 06, 2010 8:35 PM EDT

NORTHAMPTON, Mass. - Three Massachusetts teenagers charged in the bullying of a 15-year-old girl who committed suicide have entered not guilty pleas through their lawyers.

The teens were not required to appear at the hearing Tuesday in Hampshire Superior Court.

Seventeen-year-old Sean Mulveyhill and Kayla Narey of South Hadley and 18-year-old Austin Renaud of Springfield will remain free on personal recognizance as long as they stay away from the family of the girl who died. Mulveyhill and Renaud are charged with statutory rape.

Charges against Mulveyhill and Narey include civil rights violations and harassment. They are among nine teens charged in what prosecutors said was the "unrelenting" bullying of Phoebe Prince (pictured) at South Hadley High School. Prince committed suicide Jan. 14.