Trump made a surprise announcement on Monday that Washington and Tehran would begin talks in Oman, a Gulf state that has mediated between the West and the Islamic Republic before.

The January return to the White House of Trump, who in his first term withdrew the U.S. from a 2015 big-power accord with Tehran, has again brought a tougher approach to a Middle Eastern power whose nuclear programme Washington's ally Israel regards as an existential threat.

At the same time, Iran and allied groups have been weakened by the military offensives Israel has launched across the region, including air strikes in Iran, after being attacked from Gaza by Palestinian militant group Hamas in October 2023.

The Iranian foreign ministry said on Friday that the U.S. should value the Islamic Republic's decision to engage in talks despite what it called Washington's "prevailing confrontational hoopla".

"We intend to assess the other side’s intent and resolve this Saturday," spokesperson Esmaeil Baghaei posted on X. "In earnest and with candid vigilance, we are giving diplomacy a genuine chance."

U.S. air attacks on Yemen's Houthis, who are aligned with Iran and have hit international shipping lanes in the Red Sea in support of Hamas, have stirred speculation that Washington might be preparing to attack Iran.

Meanwhile, Israel has resumed its devastating military campaign against Hamas, which has also received support from Iran, after several weeks of truce, and its ceasefire with the Iranian-backed Lebanese Hezbollah militia remains brittle.

'IMPORTANT AND PRACTICAL' IRANIAN PROPOSALS

Iran had rejected direct negotiations with Washington before Trump announced on March 30: "If they don't make a deal, there will be bombing, and it will be bombing the likes of which they have never seen before."

"Important and practical" Iranian proposals have been prepared in pursuit of "a real and fair" agreement, Ali Shamkhani, an adviser to Iran's Supreme Leader Ayatollah Ali Khamenei, said in a post on X.

"If Washington comes to the talks with sincere intentions and genuine will to reach an agreement, the path to a deal will be clear and smooth," Shamkhani added.

Since Trump pulled the U.S. out of the 2015 deal that curbed Iran's uranium enrichment activity, deeming the accord deeply flawed, Tehran has accumulated a stockpile of uranium refined to levels close to what would be suitable for nuclear bomb fuel.

Iran had agreed in the deal, reached during U.S. President Barack Obama's administration, to strictly limit its enrichment activity in return for a lifting of global economic sanctions.

Tehran says its programme is purely for peaceful energy purposes, but the West says it goes far beyond any civilian requirements, and suspects Tehran of developing nuclear weapon capability.

DIRECT-INDIRECT TALKS

Confusion swirled after Trump announced that the talks between the longtime geopolitical adversaries would be direct, while Iran has insisted they would be indirect, with Omanis acting as mediators.

Iranian state media said the talks would be led by Foreign Minister Abbas Araqchi and U.S. special envoy Steve Witkoff, with Omani Foreign Minister Badr al-Busaidi as intermediary.

Shamkhani said Araqchi was heading to neighbouring Oman with "full authority" for indirect talks.

The U.S. and Iran held indirect talks during President Joe Biden's term that ended in January but made little if any progress. The last known direct negotiations between the two governments were under Obama.