[Updated 1:56 p.m. ET] A Virginia Tech police officer has been shot and killed after making a traffic stop on the university's campus, Mark Owczarski, the university's director of news and information, said Thursday.
The suspect fled on foot toward another parking lot where a second person was also found dead, he said.
The shooter is still at large, he said.
[Updated 1:39 p.m. ET] Sirens were heard around the Virginia Tech campus Thursday, and rescue workers were trying to resuscitate a person who was on the ground, school employee Brian Walls told CNN. The school was on lockdown after shots were reported, and the school's website said a police officer was shot.
Follow the incident via the Twitter feed of the school's newspaper, the Collegiate Times. These reports have not been confirmed by CNN.
[Updated 1:16 p.m. ET] A police officer has been shot on or near the campus of Virginia Tech, the university's website says. A possible second victim is reported down in a parking lot and the suspect is at large, the website says.
Classes for the semester ended Wednesday. Students were preparing Thursday for final exams.
[Posted 1:01 p.m. ET] The campus of Virginia Tech University in Blacksburg is on lockdown after a report of shots being fired on the campus.
The suspected shooter is described as a white male wearing gray sweat pants, a gray hat with a neon green brim and a maroon hoodie and carrying a backpack, according to the university's website.
Those on campus should seek shelter or stay where they are, the website says.
In April 2007, Cho Seung-Hui, a 23-year-old Virginia Tech student, shot dead 32 people on the campus before killing himself.
Are you on campus? Share your story, but please stay out of harm's way.