A man from Ghana has been arrested in Tsim Sha Tsui after arriving in Hong Kong with $1.15 million worth of heroin and cannabis. In an attempt to snare the man's local associates, customs officers deliberately let him through checks at the airport after he arrived from Thailand on Friday. The 30-year-old was arrested later that night when his contacts failed to turn up. The haul of 1.1kg of high-grade heroin and 7kg of cannabis was concealed in two suitcases. The heroin was concealed in three packages in the smaller suitcase, while the cannabis was hidden in the larger suitcase. The drugs were wrapped in aluminium foil and coated with coffee in an attempt to thwart sniffer dogs. Concrete blocks were also put in the suitcases in an attempt to bypass X-ray checks. 'If we arrested him and seized the drugs at the airport, all leads to the buyers and the syndicate would be lost. We thought there would be a member of a drug syndicate waiting to pick the man up,' said Yu Koon-hing, senior superintendent of Customs' Drug Investigation Bureau. But there was no one waiting for the man at the airport. Investigators believe the man was merely a courier and decided to follow him. The African - who failed to get in touch with his contacts on his mobile phone after reaching Tsim Sha Tsui - was arrested as he checked into a guesthouse in Mirador Mansion. He was still being held yesterday for questioning and police believe the drugs were destined for drug dealers operating in Tsim Sha Tsui and Mongkok. It was not known why his contacts had failed to show up. Mr Yu said that with the Lunar New Year holiday approaching, demand for drugs would probably increase and traffickers were likely to attempt to smuggle drugs through busy checkpoints such as Lowu. Customs officers wearing plain clothes have been deployed at all checkpoints and will be queuing with travellers as part of the department's surveillance efforts. The number of uniformed officers has also been increased at checkpoints. Mr Yu added that his department had also stepped up liaison with its mainland counterparts to crack down on the drug trade.