Two Texas A&M University students -- who were brother and sister -- were shot and killed Friday in their off-campus apartment, and a student at nearby Blinn College has been charged with the murders, The Bryan/College Station Eagle reported. Also on Friday, students were scared but there were no injuries when a police officer at the University of Illinois at Chicago accidentally discharged his gun while investigating reports of possible gunfire on campus, the Chicago Tribune reported. Also last week, five men who are not students at Fairleigh Dickinson University were arrested following reports that someone was waving a gun at the New Jersey university, the Associated Press reported. And in South Carolina last week, a student at York Technical College was arrested after a handgun he was carrying went off during class. WCNC News reported that the student originally said that he fell asleep in class and that the gun fired when it fell through a hole in his pocket. But the student -- who faces charges of carrying a pistol unlawfully and carrying a weapon on a campus -- then changed his story and said that he was holding his handgun in his pocket and that he accidentally hit the trigger. The professor in the class reported that, after the incident, the student apologized and left the class.