ANKARA, Turkey (AP) – Turkey’s prime minister is seeking international support for a deal under which Iran would ship much of its low-enriched uranium to Turkey.

Recep Tayyip Erdogan’s office says Saturday he has written to the leaders of 26 countries saying the deal would resolve the nuclear standoff with Iran by way of diplomacy and negotiation. The countries include all permanent and non-permanent members of the U.N. Security Council.

The deal brokered by Turkey and Brazil last week has failed to ease concerns in the West where there are fears that Tehran will continue to enrich uranium to higher levels.

The U.S. introduced a resolution this week calling for a series of economic and trade restrictions, after winning support from China and Russia.