They say Iran must abandon uranium enrichment, but this is one of our red lines. If talks are conditional on halting enrichment, they simply won’t happen," said Ali Velayati, senior adviser to Supreme

If the negotiations must be conditioned on stopping enrichment, such negotiations will not take place,' said an advisor to Iran's supreme leader on Monday. Israel and Western nations accuse Iran of pursuing nuclear weapons,

Iran's supreme leader advisor Ali Larijani said Friday that Tehran is reviewing messages from Washington on the possible resumption of nuclear negotiations, according to Iranian media. Larijani emphasized, however, a complete lack of trust in the US, asserting that “we no longer have any trust in America,” said the ISNA news agency.