Police have fired tear gas at tens of thousands of Hongkongers protesting in Yuen Long, a town in the northern New Territories that has been gripped by tension over the past week, following earlier scenes of unprecedented violence at a railway station. The protesters have continued their call for a full withdrawal of a now-suspended bill that would have allowed the extradition of fugitives to mainland China. They have also responded to attacks on July 21, when men – thought to include local…