Iran's top nuclear negotiator Ali Larijani said Tuesday that Tehran had no intention of withdrawing from the Nuclear Nonproliferation Treaty. Iran's parliament threatened Sunday to ask the government to withdraw its signature from a protocol in the treaty that allows intrusive snap inspections of nuclear facilities. "We have no reason to leave the NPT. Our case is completely different from that of North Korea," Larijani told reporters during a visit to Athens. "The additional protocol is one thing and the NPT is another," he said.