Police seized two imitation rifles and arrested four men and two women in a Tuen Mun hut last night. The AR-15 military rifle replicas were found when officers raided a hut in Yick Yuen Tsuen, on Castle Peak Road, at time about 5pm. Three machetes, two beef knives, three boxes of firecrackers, metal drain covers and the illicit drug ketamine were also seized. Those arrested were a husband and wife, their two children and two tenants, some believed to be members of the Sun Yee On triad society with criminal records. 'We suspect the machetes would be used for fighting,' Chief Inspector Boris Kwan Woon-man of New Territories North crime unit said. Police would investigate whether the guns had been used in crimes, he said. In an earlier operation, officers raided a recycling factory at Lei Uk, near Fanling's Ping Che Road. Fifteen sections of cable from China Light and Power worth HK$200,000, a rubbish bin from Kowloon Motor Bus, two air guns, three road signs and four Octopus card readers from Light Rail Transit were also found. They were believed to have been stolen and sold to the factory, police said. Three men and two women aged 35 to 48 were arrested for allegedly handling stolen goods. They were being held last night.