Virginia Tech student Blake Harrison said he was on his way to class near Norris Hall when he saw chaos.

"This teacher comes flying out of Norris, he's bleeding from his arm or his shoulder ... all these students were coming out of Norris trying to take shelter in Randolph [Hall]. All these kids were freaked out," Harrison said.

The students and faculty were barricading themselves in their classrooms after what one person described as an Asian student wearing a vest opened fire.

The shooter was "wearing a vest covered in clips was just unloading on their door, going from classroom to classroom … they said it never seemed like it was going to stop and there was just blood all over," Harrison said.