DUBAI, United Arab Emirates — 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.

The two sides remain divided on the key question of whether Tehran will be allowed to enrich its own uranium as they meet for their fourth round of negotiations on Sunday.

A fourth round of talks between the US and Iran on Iran’s nuclear program have begun in Oman, according to Iranian state media, with the two sides aiming to overcome divisions that could scupper the tentative negotiations.

Iran's foreign minister torched President Donald Trump's decision to reportedly rename the Persian Gulf the Arabian Gulf as "indicative of hostile intent."

Iran is watching the plans by US President Donald Trump to visit the region, and it is seeking to continue talks with the US.Iran has also distanced itself from the Houthis' attacks on Israel. Iran is basically playing a very cautious game.

Iran's army chief of staff said the Islamic Republic's armed forces are at peak combat and intelligence readiness, warning that while enemies may start a conflict, Iran will decide how and where it ends,