Authorities in Pennsylvania say a fourth teenager has been charged in the fatal beating of a Mexican immigrant.

Schuylkill County prosecutors charged the teen in juvenile court Friday with aggravated assault, ethnic intimidation and other offenses. His name and age are not being released.

Three others are charged as adults in the July attack in the town of Shenandoah on 25-year-old factory worker Luis Ramirez.

Homicide charges are filed against 16-year-old Brandon Piekarsky and 17-year-old Colin Walsh. Eighteen-year-old Derrick Donchak faces aggravated assault and other charges.

A local school district has agreed to provide Piekarsky and Walsh with 12 hours of in-home education per week while the case against them is pending.