Two people are dead after a shooting on the campus of the University of North Carolina at Charlotte, according to Mecklenburg Emergency Medical Service Agency.
Two other people are being treated for life-threatening injuries, and two more people have non-life threatening injuries, the agency said.
One person is in custody, a city official said.
Law enforcement officers were sweeping the affected buildings, the university tweeted.
“Follow officer commands,” the school said.
Video posted to Twitter by Jordan Pearce, a student, showed people fleeing a campus library as police sprinted toward the building.