Hong Kong police fired tear gas at anti-government protesters who had gathered outside Sham Shui Po Police Station to pray for blessings in a celebration of the annual Hungry Ghost Festival on Wednesday night after they refused to stop aiming laser beams at the building and leave the area.The event started at 8pm on Yen Chow Street outside the Dragon Centre shopping centre, which is near Sham Shui Po Police Station, one of the spots where protesters had clashed with officers on several…