The previous set of photos was taken on Istiklal avenue approaching Taksim Square.
These photos were taken mainly at the Square and adjoining Gezi Park.
Please note that the big red puddle is not blood. Police here use red dye in their water cannons to mark demonstrators for later arrest. Quick update; as of Sunday afternoon the Turkish media has finally started to give coverage to the demonstration and they are reporting that roughly 1 million people participated in Istanbul alone.