Iran accused the US of "contradictory behavior and provocative statements" after the US warned Iran of consequences for backing the Houthis and imposed new sanctions.

The United States has imposed another round of sanctions targeting Iran, seeking to stem its petrochemical profits amid ongoing nuclear talks between the two countries.

Tehran called Sunday’s meeting “difficult but useful” as the two sides clash over future of Iran’s uranium enrichment.

Iranian Foreign Minister Abbas Araghchi has reaffirmed that uranium enrichment is Iran’s non-negotiable right as he heads to Muscat for the fourth round of nuclear talks with the US. Highlighting contradictions in Washington’s stance,

Iranian Foreign Minister Abbas Araghchi has said Tehran will not back down on its “nuclear rights”, hours before talks with the US on the subject were to resume in Oman. He told an Arab-Iranian conference in Doha on Saturday night that “if the goal of these talks is to ensure the non-acquisition of nuclear weapons,

The source reportedly added that the responses given by the US included "short and general answers," disregarding "main proposals."

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.