added security measure in the lead-up to next month's Beijing Olympics, state media reported on Tuesday. Local police had been ordered to "destroy the marketing, storage and transport network of imitation guns and track down and bust the original sources of the illegal production", Xinhua news agency quoted the Ministry of Public Security as saying. The ministry had also instructed border inspection agencies to strengthen supervision of checkpoints to counter the "illegal import and export of (replica) guns", Xinhua said.