CLIFTON - Officials are asking students at Clifton High School to come forward if they have any information about a rape that occurred on school grounds.

Two students have been accused of sexually assaulting a 15-year-old girl in a stairwell during school hours in May. Police say the girl waited several weeks to report the incident because she was afraid.

Police have charged 19-year-old Jaime Urbina and a 17-year-old, whose name is being withheld due to his age, with aggravated sexual assault, aggravated sexual contact and criminal restraint.

Urbina is held on $150,000 bail. The 17-year-old is being held at a juvenile detention center.

School administrators say they have a responsibility to provide a safe and secure learning environment at the high school, but with an enrollment of 3,400 students, they need students and parents to let them know when there's a problem.