Virginia Tech shooting: Campus on lockdown, gunman at large
A possible second victim was also found dead in a campus parking lot, reports local news station WDBJ.
"This was a traffic stop on campus," reported MSNBC's Pete Williams. "It was not someone walking around firing shots."
"We don't know if the suspect fled or the extent of the injuries to the suspect or to the officer," he added.
A campus alert described the shooter as a white male wearing gray sweat pants, a gray hat with a neon green brim and a maroon hoodie. He was also carrying a backpack. He was last seen approaching the university's main gym facility.
Here's a statement released Thursday afternoon by the university:
" Shortly after 12 p.m. today, a Virginia Tech Police officer stopped a vehicle on campus during a routine traffic stop in the Coliseum parking lot near McComas Hall
During the traffic stop. the officer was shot and killed. There were witnesses to this shooting.
Witnesses reported to police the shooter fled on foot heading toward the Cage, a parking lot near Duck Pond Drive. At that parking lot, a second person was found. That person is also deceased.
Several law enforcement agencies have responded to assist. Virginia State police has been requested to take lead in the investigation
Status of the shooter is unknown. The campus community should continue to shelter in place and visitors should not come to campus."
In 2007, in the deadliest mass shooting in U.S. history, 33 people were killed by gun-wielding student Seung-Hui Cho.
We'll add more details as they become available.
Update, 2:50 p.m. ET: Virginia Tech's student newspaper, The Collegiate Times, is uploading pictures of the campus to a flickr set and tweeting non-stop updates as the search for the shooter continues.