DUBAI, United Arab Emirates (AP) — Iran and the United States began a fourth round of negotiations Sunday over Tehran’s rapidly advancing nuclear program, officials said, just ahead of a visit by President Donald Trump to the Middle East this week.

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The United States and Iran completed the fourth round of their negotiations in Muscat, Oman, on Sunday over Tehran’s advancing nuclear programme, with both sides agreeing to reconvene at a later date. The talks, held amid growing regional tensions and ahead of President Donald Trump’s visit to the Middle East, lasted approximately three hours.