Napa High School classrooms took a beating on Wednesday night from vandals who broke windows and helped themselves to items inside.

Napa Police investigators estimate about 25 windows were shattered in the H wing of the school, which houses the science, math and other classrooms. The damage has been estimated around $2,500. The vandalism was discovered by staff around 7 a.m. Thursday.

After breaking the windows, the vandals entered the interior of the building through an office. Once inside the hallway, they broke the windows of the classroom doors to gain entry to the rooms, police said.

The school reported several personal items missing, such as radios and cell phones, but no computers or other high-ticket items were taken or damaged, police said.

John Glaser, Napa Valley Unified School District superintendent, said they also found a small amount of graffiti.

“We are working hard to secure the building. I don’t know how long it will take to repair the damage, but it will be done before school opens next week. The major damage is the broken windows,” Glaser said.

Glaser said it is not unusual to find graffiti at the school. “We come across that frequently and remove it quickly. But this is the first time we have had vandalism of this magnitude.”

Glaser said the school has an alarm system.

As of this time, police do not have any suspects or witnesses. School resources officers are investigating the incident.

Anyone with information is asked to call Napa police dispatch at 253-4451.