UNITED NATIONS (Reuters) - Iran has denied allegations that it has been supplying Islamist militants in Somalia with weapons, describing the charges as "absurd fabrications," according to a letter obtained by Reuters on Thursday. As the United States pushes for an end to the U.N. arms embargo on Somalia, U.N. monitors following Somalia sanctions warned that Islamist militants in the Horn of Africa nation are receiving weapons from distribution networks linked to Iran and Yemen, diplomats told Reuters. According to the latest findings by the U.N. ...