Iran is poised to reject a U.S. proposal to end a decades-old nuclear dispute, an Iranian diplomat said on Monday, dismissing it as a "non-starter" that fails to address Tehran's interests or soften Washington's stance on uranium enrichment.

The preliminary U.S. proposal came as a confidential U.N. report described an Iranian initiative that had multiplied Tehran’s stockpile of near-bomb-grade uranium.

This follows earlier reports from Monday that Iran is poised to reject a US proposal to end a decades-long nuclear dispute. The US nuclear deal proposal that was allegedly given to Iran would allow limited and low-level uranium enrichment,