Two brothers, jailed for 15 and 18 years last year for a string of armed robberies, were sentenced to serve another two years each for four other gang robberies they organised between 1997 and 2002. Wong Hoi-chung, 36, and Wong Chi-hung, 43, pleaded guilty to the charges yesterday before Mr Justice Alan Wright. The Court of First Instance heard the pair recruited illegal mainland immigrants to carry out the four robberies - three of which took place as security guards were escorting money collected from the Hong Kong Jockey Club, Yaohan Department Store and a foreign-exchange service in Wan Chai. Guns, metal pipes and knives were also provided to the robbers, who stole HK$1.6 million in cash and two shotguns and ammunition. Mr Justice Wright jailed the pair for 14 years, of which only two years will run consecutively to the terms for the three robberies of which they were convicted last year. Prosecuting barrister Jackson Poon told the court that Cheung kai-chung - who was granted immunity from prosecution for the gang robberies and the murder of a security guard in a March 2003 robbery - was recruited by the brothers to commit the four robberies. In early March 1997, Wong Chi-hung arranged for Cheung to travel from the mainland to Hong Kong. He also hired two mainlanders to come to the city to carry out a robbery with Cheung's help. On April 10, 1997, the gang, including the defendants, arrived at the Yaohan Department Store in Tseung Kwan O and waited for security guards to come out of the accounts department. They then pointed two pistols at the two security guards and said: 'Robbery!' One of the guards, who was carrying a cash case filled with HK$366,292, was pushed to the ground and his cash case was snatched. An alarm system in the case was triggered and began emitting smoke. The money was recovered in Ngan O Road, where the robbers had dumped the case without opening it. In a second robbery, a woman was robbed of about HK$30,000 and jewellery as she left a bank in Tsuen Wan on July 27, 1999. On June 14, 2001, a third robbery took place in Wan Chai when a security crew collected cash from a foreign-exchange service in Fleming Road. A total of HK$44,645 and 89,666 yuan was stolen. On June 6, 2002, the gang raided the Hong Kong Jockey Club in Wong Tai Sin after two security guards collected HK$1.2 million. Three robbers armed with a knife attacked the guard carrying the cash case. One snatched a shotgun from the other guard and told them to open the case. The money and shotgun were both stolen. One guard sustained stab wounds on his neck and shoulder.