Iran has agreed a deal to send uranium abroad for enrichment after mediation talks with Turkish and Brazilian leaders, BBC reports.

Iran's Foreign Ministry said it was ready to ship 1,200kg of low-enriched uranium to Turkey, in return for nuclear fuel for a research reactor.

The plan could revive a UN-backed proposal and may ward off another round of sanctions.

Iran's President Mahmoud Ahmadinejad is calling on world leaders for new talks. He said it was time for talks "with Iran based on honesty, justice and mutual respect".

Turkish Prime Minister Recep Tayyip Erdogan, Brazil's President Luiz Inacio Lula da Silva and Iranian President Mahmoud Ahmadinejad were at the talks in Tehran.

"Turkey will be the place to keep Iran's 3.5% [low-enriched] uranium," Iranian Foreign Ministry spokesman Ramin Mehmanparast told a news briefing after the deal was signed.

He said that 1,200kg would be exchanged and that Iran would notify the UN nuclear watchdog, the International Atomic Energy Agency, "within a week".