A 17-year-old boy has been arrested on charges of attempted rape involving four teenaged girls, Pocono Mountain Regional police announced Friday.

Two of the assaults happened during school hours on the grounds of the Pocono Mountain School District in Monroe County, said police, adding that all four assaults took place between June 2011 and May 2013.

The boy, whose name has not been released, was charged with criminal attempt to commit rape, criminal attempt to commit involuntary deviate sexual intercourse, indecent assault, indecent exposure and open lewdness.

The four victims ranged in age from 14 to 19, police said.