Hong Kong police were hunting for a gunman after a man was shot in a brawl in Sham Shui Po on Friday night.Pedestrians told police two men had been fighting on Cheung Sha Wan Road near Kweilin Street at about 10pm, with one brandishing a section of pipe and the other holding what appeared to be a pistol. A gun shot was heard during the clash.Both men fled the scene afterwards. A report was made to police at about 10.15pm.Soon after the clash, a man with arm injuries attended Caritas Medical…