Twelve Moanalua High School seniors are banned from taking part in the school’s graduation ceremony Friday after the campus was vandalized overnight Monday.

The students have been identified as possible suspects in the incident and are under investigation, the state Department of Education said. Police have opened cases of second-degree criminal property damage and second-degree burglary.

Derek Inoshita, DOE spokesman, said officials discovered the vandalism Tuesday morning, which includes spray-painted “seniors” graffiti on multiple buildings and a driver’s education vehicle. Also, vandals apparently ripped a water fountain off a wall and draped toilet paper in trees on the campus.

Officials were investigating whether a classroom was broken into and whether anything had been taken.