Iran said on Monday it had received a request from the United States for a new round of talks on ways to improve security in Iraq and was considering it. Easing a diplomatic freeze lasting almost three decades, Iranian and U.S. officials met three times in Baghdad last year, but a planned fourth meeting has been repeatedly postponed. "We have received a new request by American officials in a formal note for the holding of negotiations on the Iraqi developments and we are looking into the case," Foreign Ministry spokesman Mohammad Ali Hosseini told a news conference. He was quoted as saying by Reuters that the U.S. note had been delivered via the Swiss embassy in Tehran, which handles U.S. interests in the Islamic Republic.