Hong Kong police have arrested a 14-year-old boy after a razor blade was found wedged between two seats on a Citybus double-decker, with the force alleging the suspect pointed the blade at his schoolmates during a dispute on the bus. Inspector Lee Yan-hon, of the Wan Chai district crime squad, said on Friday that police had identified the teenager through the bus’s CCTV footage after receiving a report from a passenger earlier in the week. “[The boy] remained on the upper deck towards the back....