Iran and the United states have reached a deal that will see billions of dollars in Iranian funds unblocked in exchange for three Americans held in Iran, three leading conservative outlets have reported.

IRNA, Fars News and Farhikhtegan cited "informed sources" as confirming that the agreement would allow Iran to access a "significant amount" of its funds frozen due to US sanctions.

"Iran has not put all its eggs in one basket," reported Farhikhtegan, noting that the reported deal is independent from the months-long indirect talks between Iran and the United States over the 2015 nuclear deal, the Joint Comprehensive Plan of Action (JCPOA).

While a precise amount was not mentioned, the three outlets announced that it was "several times" more than the $530 million in delayed debts paid off to Tehran by the UK government in March. At the time of the repayment, British-Iranians Nazanin Zaghari Ratcliffe and Anoosheh Ashouri flew home following years of captivity in Tehran. Iran has, however, denied any links between the pair's freedom and the debt settlement.