ISTANBUL, Jan 30 - Iran is prepared for the resumption of talks with the United States, but they should be fair and not include Iran's defence capabilities, Iran's chief diplomat said on Friday, as regional powers work to prevent military conflict between the two foes.

U.S. President Donald Trump said on Thursday he planned to speak with Iran, even as the U.S. sent another warship to the Middle East and the Pentagon chief said the military would be ready to carry out whatever the president decided.