Authorities at Georgia Tech advised students to stay indoors Monday night, warning of violent protests at which at least three people were arrested following the fatal police shooting of a student over the weekend. Georgia Tech spokesman Lance Wallace said in a statement that about 50 protesters marched to the campus police department late Monday, where one police car was damaged and two police officers suffered minor injuries. The protests came shortly after a vigil for 21-year-old Scout Schultz, a campus Pride leader who was shot and killed by police Saturday night after allegedly refusing to put down a knife. The Georgia Bureau of Investigation, which is probing Schultz’s death, said Monday that the 911 call that led police to the university campus on Saturday night came from Schultz. Three suicide notes were found in his dorm room, investigators said.