An Iranian exile group claimed Friday that Tehran had acquired banned machinery to further the country's nuclear weapons ambitions. The group, the National Council of Resistance of Iran, also claimed that the machinery, which they identified as a "hot press" and a "hot iso-static press," was being kept at a secret site 40 kilometers (25 miles) west of Tehran. "These machines are able to simultaneously use pressure and heat to produce uranium spheres for production of nuclear bombs," Dowlat Nowrouzi, NCRI's representative in Britain, told a news conference. "Both of these machines are banned items." Requests for comment from the Iranian Embassy in London were not immediately returned.