Shooting in Blacksburg

The local television news is reporting on a tragic shooting in Blacksburg on the campus of VA Tech, which will doubtless bring national news coverage.  I'm in shock as I'm listening to the current reports of 20 students dead in an apparent random shooting.  That count may or may not increase as the news reports progress.  It is also being reported that one gunman has been apprehended and that they are still trying to apprehend a second gunman.  This is unbelievably tragic, horrifying.

Edit: Correction: I just heard reported that one of the gunmen is dead, though it is unclear whether he shot himself or whether he was shot by the police or someone else.