AJE (http://english.aljazeera.net/) and Reuters have APCs moving on the bridges nearby. A lot of gunfire in the background of their correspondents' phones during interviews. Very confusing due to sound reverberating off of the high-rises that ring the square.
MSNBC reporters have a hotel with a direct view, and are also giving live commentary. Gunfire and what sounds like artillery are clearly audible.<p>EDIT: State Department has arranged evacuation flights and is advising Americans to report to the airport immediately.