Pakistan says it has sent centrifuge components to the U.N. nuclear agency in Vienna to assist its probe of Iran's nuclear program. A foreign ministry spokesman told Geo news channel that Pakistani experts have been sent to the International Atomic Energy Agency along with some old and discarded parts of the centrifuges. The nuclear agency wants to determine whether the traces of highly enriched uranium found in Iran originated on equipment bought from Pakistan or was a result of activities within Iran. Last year, the ousted chief of Pakistan's nuclear program, A.Q. Khan, confessed to supplying sensitive nuclear technology to Iran, as well as North Korea and Libya. Pakistan says Khan had been operating without official permission.