An interesting photo story about the protest at BelaPAN Internet paper (text is in Russian, but some of the stuff from it can be found in this AP piece in the Guardian).
I'm not sure this is mentioned in the AP story - I didn't read it, just glanced through. This is a caption to the photo of green buses and men in black standing next to them, at the end of the piece:
#100 bus stops at Oktyabrskaya Sq. again. Activists get out of the bus and run toward the camp, trying to avoid being detained by the policemen patrolling the square.