Authorities have demanded that Hong Kong’s largest franchised bus operator investigate glitches in its fare rebate machines, which provided free trips to passengers on the day a revised HK$2 (26 US cents) transport subsidy scheme was implemented. The city’s welfare minister also stressed on Saturday that the problems that occurred with KMB’s machines the previous day – when the revised scheme took effect – did not involve any malfunction in the government’s own system. “We understand that the...