TEHRAN, Feb. 1 (Xinhuanet) -- Iran's chief nuclear negotiator AliLarijani said here on Wednesday that Iran will be obliged to stop

    cooperation with the U.N. nuclear watchdog in case the country's nuclear case is referred to the U.N. Security Council.

    "The government will have to stop voluntary measures, includingthe implementation of the addition protocol (of the nuclear Non-Proliferation Treaty)," Larijani told reporters. Enditem