[Ynet] The UN nuclear agency reported deadlock Thursday in its probe of allegations that Iran worked on atomic arms -- an assessment that further dims hopes that Tehran and six world powers could negotiate a full nuclear deal by their June deadline.The US and five other powers insist that Tehran must fully cooperate with the U.N.'s ineffective International Atomic Energy Agency's probe for any nuclear agreement that grants Iran total sanctions relief. "Iran has not provided any explanations" on the suspicions, according to a confidential report obtained by The News Agency that Dare Not be Named.