Hong Kong's top prosecutor is to meet with police on Monday to discuss the growing problem of fung shui trees being uprooted and smuggled to the mainland. Director of Public Prosecutions Grenville Cross SC will meet senior police officers 'to examine how evidence can be collected and presented ... to enable those responsible to be prosecuted', Senior Assistant Director of Public Prosecutions Kevin Zervos SC said yesterday. 'This is happening a lot ... and I can assure you that the authority is taking this very seriously,' Mr Zervos told judge Chua Fi-lan. 'This is very much on the agenda,' Mr Zervos said. Six mainlanders were caught off the coast in Sai Kung on Thursday night in the latest round of arrests. The news of Mr Cross' meeting comes as police are becoming increasingly frustrated in their bid to bring mainland poachers to justice as charges of theft and handling stolen goods are often dropped in favour of immigration offences. 'We feel that we are really getting nowhere with this,' a senior officer said of the frustration widely felt within the force. Police have recorded a rising number of cases in which mainlanders are paid to sneak into Hong Kong, usually by boat, to steal and smuggle Buddhist pines, a protected species on the mainland which can yield up to $50,000 per tree for its alleged fung shui value. In court yesterday, Mr Zervos explained that charges of theft or handling stolen goods were often not proceeded with due to the limited chances of getting a conviction despite the existence of a prima facie case. Yesterday's case before Judge Chua was just one example, police sources said. Police have yet to decide whether charges are to be laid against the six mainlanders arrested on Thursday, according to Detective Chief Inspector Chris Richards of the Marine Regional Crime Headquarters.