GREATER co-operation between anti-triad police and contractors was urged yesterday to prevent triad extortion on airport works. The appeal was made by the director of criminal investigation, Assistant Commissioner Tsang Yam-pui, to more than 50 senior representatives from 35 companies working on port and airport-related contracts. The landmark meeting, the first of its kind between police and senior management of construction companies, was held to help prevent contractors becoming victims of extortion. All the major firms working on airport core projects attended the seminar. Among them were Airport Platform Contractors and groups constructing the Tsing Ma and Kap Shui Mun bridges. Crime Prevention Bureau Commander, Superintendent Graham Lander, said: 'The invitation was to further our liaison, to give them information on the new organised crime law that is pending, how it would affect them in combating organised crime on their sites and attempts at extortion and what we would like them to do in the future.' He explained the new laws would give police the power to prosecute firms if they paid extortion and did not report it to the police. 'For some of the firms it was a bit of an eye-opener,' he said. Several undercover operations have been carried out by police and they are aware criminal gangs have tried to approach firms working on airport core contracts. Mr Lander said one of the aims of the seminar was to tell contractors what to do if they were contacted. 'Very often people have only heard of the problem through reputation in Hong Kong. We tried to dispel some of the myths. 'Triads and gangs are not quite so sophisticated and all-embracing as people imagine them to be and they can actually be rebutted,' he said.