The Blacksburg, Virginia school was the scene of one of the deadliest mass shooting in recent history.  Today the campus is on lock down again after a police officer and possible another person were shot on campus.

From AP via ABC News:

The suspect was described as a white male wearing gray sweat pants, a gray hat with neon green brim, a maroon hoodie and backpack.

A message left with the university wasn't immediately returned. Campus police referred all questions to the university.