Iran and the U.S. have held five rounds of talks since April 12, aiming to hash out a deal that limits Iran’s nuclear program in exchange for the removal of sanctions on Tehran.

Tehran: Amid the escalating tensions between Iran and Israel following Tel Aviv's airstrikes on Friday, Iran's Foreign Ministry spokesman Esmail Baqaei on Saturday said that nuclear talks with the United States are 'meaningless' following the Israeli airstrikes on the country.

Israel and Iran launched fresh attacks on each other overnight into Sunday, stoking fears of a wider conflict after Israel expanded its surprise campaign against its main rival with a strike on the world's biggest gas field.