A 20-year-old student was arrested last night after rifle parts and about 900 bullets were found in a storeroom in a Kwun Tong housing estate. The ammunition and parts were found in Tsui Tsz House, Tsui Ping Estate by a construction worker who drilled through the wall. Assistant Kwun Tong District Commander (Crime) Superintendent John Ribeiro, said: 'There are about 990 bullets mainly consisting of Remington shots, 9 mm and 5.65 mm bullets inside two bags.' He said the ammunition was sealed in cartridge boxes or self-made plastic cases. The three types of ammunition could be fired from a rifle, a shotgun or a pistol. The suspect, a student from the Open Learning Institute, was arrested at his home in Po Pui Court, Tsui Ping Road. Ten air pistols, a harpoon and 20 rounds of decommissioned bullets were also found. Police sources said the student could have had access to the storeroom through his father, who works for the Housing Authority. The suspect was traced through a receipt that was found in one of the bags. He was being questioned last night. Under firearms laws, anyone holding a gun licence can buy large amounts of ammunition from licensed dealers. Firearms Licensing Department Superintendent Peter Pang Moon-kwan said the only restriction was the amount the dealer had available to sell. Yesterday the South China Morning Post , posing as a buyer, telephoned a licensed dealer and was told buying 900 rounds of ammunition was 'no problem' if a licence was shown.