The U.N. nuclear agency says its experts have again failed to dent Iran's refusal to cooperate in probing allegations that Tehran covertly worked on an atomic arms program.

An International Atomic Energy Agency statement says Iran refused an IAEA request for access to a site where the agency suspects explosives testing related to a nuclear weapon took place.

It also says that despite "intensive efforts," no agreement was reached on how to relaunch the probe, which has been stalled for nearly four years.

The statement was released early Tuesday, after the IAEA team left on a return flight to Vienna. The unusual timing -- shortly after midnight in Europe -- reflected the urgency the IAEA attached to the communique.

Iran denies any interest in possessing nuclear weapons.

 

(Copyright 2012 by The Associated Press.  All Rights Reserved.)

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