A diplomat close to a UN investigation of Iran's nuclear program says Pakistan has agreed to hand over used centrifuge components to the UN nuclear watchdog agency. Inspectors hope tests will prove whether traces of enriched uranium found in Iran came from the Pakistani equipment, as Tehran has argued, rather than from material produced at the Iranian site. Each batch of enriched uranium has a unique "fingerprint." Islamabad acknowledged for the first time last week that Pakistani scientist Abdul Qadeer Khan gave equipment to Iran. It has previously admitted that his group sold technology and blueprints to North Korea, Libya and Iran. Iran insists it intends to use enriched uranium only in power stations, but Washington argues that Iran is making fuel for atomic warheads.