Cell phone videos (below) shot by students show as many as 60 students and parents fighting at a bus stop in Swissvale, Pennsylvania on Monday and Tuesday.
Swissvale Police Chief Greg Geppert told CBS Pittsburgh: “They were riots."
Police have arrested five adults and minors, all connected to Woodland Hills School.
Woodland Hills School Superintendent Alan Johnson told CBS Pittsburgh: "It was appalling. I’ve been very disappointed."
People who witnessed the fights say they are afraid to walk to the store.
Four different police departments are working to find all of the students and adults fighting on the video.