Iran has warned that nuclear talks with three European countries could break down unless those nations accept Tehran's proposals as a basis for negotiations.
In an interview published in the Financial Times newspaper, Iran's top nuclear negotiator said France, Germany and Britain must decide whether Tehran's "ideas" can be accepted as the basis for talks.
Hassan Rowhani did not give details, but officials close to the talks have said that Tehran insists on keeping the ability to enrich uranium. The three EU countries, with U.S. support, have offered Iran economic incentives if it completely stops enriching uranium.
The next round of talks is scheduled to begin April 29.
The United States accuses Iran of secretly trying to develop nuclear weapons. Iran denies the charge.
Some information for this report provided by AFP, Reuters.