Additional Reuters report that has not yet been confirmed

According to all sources, including three Iranian officials, based on proposals made during the April round of talks, Iran would limit its uranium enrichment level to 3.67%, in accordance with the JCPOA.

Iranian sources also said that Tehran is ready to give the IAEA greater access to visit its nuclear sites.

These proposals do not seek to completely dismantle Iran's nuclear infrastructure, as Israel and some U.S. officials have demanded, but rather to impose permanent limits on uranium enrichment to prevent any "nuclear breakout."

One of the three Iranian officials told Reuters:

One possible compromise could include Iran maintaining a limited amount of enrichment, with 5,000 centrifuges, and possibly importing the rest of the enriched uranium from Russia.

In exchange for limiting enrichment, Tehran has demanded firm guarantees that Trump will not abandon the nuclear deal again

According to the three sources, one of the red lines set is to reduce the amount of enriched uranium stored in the country to a level lower than the level stipulated in the 2015 agreement.

The International Atomic Energy Agency (IAEA) said in December that Iran had been able to "significantly" increase the amount of uranium enriched to 60% purity.