From a statement by Tech’s president, Charles W. Steger:

At about 7:15 a.m. this morning a 911 call came to the University Police Department concerning an event in West Ambler Johnston Hall. There were multiple shooting victims. While in the process of investigating, about two hours later the university received reports of a shooting in Norris Hall. The police immediately responded. Victims have been transported to various hospitals in the immediate area in the region to receive emergency treatment.

From the Washington Post:

The shootings, which included both students and staff members, took place at West Ambler Johnston, a dormitory, and Norris Hall, which houses the College of Engineering, at opposite ends of the sprawling campus. Authorities said the first shooting was reported shortly after 7 a.m. at the dorm and the second about two hours later at Norris Hall.

Trey Perkins, who was sitting in room 207 in Norris Hall, said the gunman barged into the room at about 9:50 a.m. and opened fire for about a minute and a half. “Some 30 shots in all,” said Perkins, who was seated in the back of the room.

It was a German class, Perkins said, and there were about 15 students in the room. The gunman, who was holding two pistols, Perkins said, first shot the professor in the head and kept on shooting at the students. Perkins said the student was of Asian descent, “around 19,” and had “very serious but very calm look on his face.”

“Everyone hit the floor at that moment,” said Perkins, 20, of Yorktown, Va., a sophomore studying mechanical engineering, who sounded shaken on the phone. “And the shots seemed like it lasted forever.”