Vienna, Jun 9 (IANS): The UN nuclear agency might need years to resolve Tehran's alleged nuclear weapon programme with Iran's cooperation, the agency's chief said here on Monday.

The progress on the clarification regarding the possible military dimensions (PMDs) of Iran's nuclear plan was still slow and it might take years to resolve the issue with Tehran, Xinhua quoted Yukiya Amano, the head of the agency.

IAEA said based on the "credible information" it had obtained, the agency identified 12 areas of PMDs of Iran's nuclear programme, asking Tehran to clarify it.

Iran denied the allegation, saying the information was forged and misleading, but in November 2013, both sides agreed to cooperate to resolve the issue.

In a statement to the IAEA board meeting earlier, Amano said he was confident that clarification over Tehran's alleged nuclear weapon plan was possible if Iran implemented the measures envisaged in the Lausanne announcement, which was agreed by Iran and five world powers in April to promote the end-June final nuclear deal.

Iran and five UN Security Council permanent members plus Germany (P5 1) are seeking a long-term solution for the disputed Iranian nuclear issue by the end-June deadline.