Fresh talks between Iranian and U.S. negotiators to resolve disputes over Tehran's nuclear programme ended in Oman on Sunday with further negotiations planned, officials said, as Tehran publicly insisted on continuing its uranium enrichment.

Iran and the United States held a fourth round of negotiations Sunday over Tehran’s rapidly advancing nuclear programme, just ahead of a visit by President Donald Trump to the Middle East this week..

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.

The US and Iran will hold a new round of nuclear talks Sunday in Oman, officials said, just ahead of a visit to the region by President Donald Trump.

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.