The source said Ali Larijani, Secretary of the Iranian Security Council, and Javier Solana, the European Union's High Representative for the Common Foreign and Security Policy, had reached the agreement during a telephone conversation earlier Thursday.
Since Iran resumed uranium enrichment in January 2006, the country has been the focus of international concerns, as some Western countries, particularly the U.S., suspect Tehran is pursuing a covert weapons program. But Tehran has consistently claimed it needs nuclear power for civilian power generation and is fully entitled to its own nuclear program.
Iran had started production of nuclear fuel on an industrial scale, the Islamic Republic's president said on April 9. And a high ranking Iranian diplomat said Wednesday that Iran would not discuss shutting down its uranium enrichment program even if discussions with the six international negotiators are resumed.