Authorities in Hong Kong have uncovered the latest tactic by smugglers bringing in untaxed cigarettes from mainland China, after HK$2.1 million (US$267,500) worth of the contraband items were found hidden in 45 fake electrical casings.The haul with a duty potential of HK$1.5 million was seized at Shenzhen Bay Control Point on Thursday when customs officers intercepted a lorry from the mainland.After an X-ray scan raised suspicions, authorities decided to open the metal cases for detailed checks…