Iran will soon hand a counter-proposal for a nuclear deal to the United States via Oman, Iranian foreign ministry spokesperson Esmaeil Baghaei said on Monday, in response to a U.S. offer that Tehran deems "unacceptable".

Mr Trump said the next round of talks would take place on June 12. Read more at straitstimes.com. Read more at straitstimes.com.

Iran's stance directly clashes with U.S. President Donald Trump 's position that Iran must halt all enrichment amid negotiations marked by uncertainty, despite having reached their most significant step since they began in April with a U.S. offer being delivered to Tehran last week.