it was 3 bald guys and 2 of them had beards enters one university or college or a highschool where older students was do lessons and they came inthere and hit one security guard in blue uniform behind hes back after they talk a while and then a cop start talking to radio inside patrol car and they hit him thought car window with a big flashlight or an iron crowbar i dont remember anything else and pull its hinges from the door to get inside,anyone know the title of this movie?