(Reuters) - Major world powers have begun talks about a United Nations Security Council resolution to lift U.N. sanctions on Iran if a nuclear agreement is struck with Tehran, a step that could make it harder for the U.S. Congress to undo a deal, Western officials said. The talks...

(Reuters) - Iran's Supreme Leader hit out on Thursday at a letter by U.S. Republican senators threatening to undo any nuclear deal between Washington and Tehran, saying he was worried because the United States was known for "backstabbing", Mehr news agency reported. Ayatollah Ali...

(Reuters) - U.S. and coalition partners conducted 13 air strikes against Islamic State militants in  Iraq  since early Wednesday, the U.S. military said. Five of the strikes in Iraq hit vehicles and Islamic State excavators near Kirkuk, and three air strikes struck...

(Reuters) - Australia is seeking to confirm Islamic State's claim that an Australian teenage recruit died after blowing himself up in Iraq, Foreign Minister Julie Bishop said on Thursday. Islamic State released an image on Wednesday claiming to show Abu Abdullah al-Australi before...