Iranian and European delegations are expected to gather in Istanbul, Turkey, on Friday for fresh talks on Tehran's nuclear program, with European nations warning that a failure of negotiations may prompt punishing "snapback" sanctions on Iran.

Since the Israeli and US strikes on Iran, in which American B-52 bombers hit three nuclear sites, Iran’s foreign minister Abbas Araghchi has accused the E3 of hypocrisy, saying they failed to uphold their obligations while supporting Israel’s attacks.

Iran said it would continue nuclear talks with European powers after "serious, frank, and detailed" conversations on Friday, the first such face-to-face meeting since Israel and the U.S. bombed Iran last month.