A senior U.S. government official said under the agreement the U.S. will obtain Iranian enriched nuclear material.

U.S. Energy Secretary Wright said sanctions on Iran could be partially lifted if an agreement is reached.

Poland's Prime Minister Tusk said on Saturday that, given expectations of an easing in a conflict involving Iran and stabilising prices, Poland will end fuel price caps this summer. In March the government cut fuel VAT from 23% to 8%, reduced excise duty to the EU minimum and imposed daily caps on motor fuel prices; those measures have been extended every two weeks since. This week Warsaw extended the VAT cut and price caps to end-June but did not extend the excise reduction. Tusk said Poland had the cheapest fuel in Europe during the crisis but the measures will be ended this summer.