Washington and Tehran may sign a preliminary agreement that provides for limiting the level of uranium enrichment in Iran to 3.67 percent, sources said, Al Arabiya television reports.

According to Al Arabiya’s interlocutors, the American side has agreed to uranium enrichment in Iran to the specified level, and Tehran has accepted this condition.

At the same time, the US insists that it is necessary to reduce the level of enrichment of Iran’s uranium reserves, which has reached 60 percent. To resolve this issue, the parties are considering the possibility of engaging a third country, Al Arabiya’s sources said.

In case of reaching an agreement with Tehran, Washington may unfreeze Iranian assets worth 6 to 9 billion US dollars.