France is ready to start talks with Iran over its nuclear program at the International Atomic Energy Agency "without delay", French President Nicolas Sarkozy told Russian President Dmitry Medvedev on Saturday.

The talks would be held "on the basis of Brazilian and Turkish efforts and the response sent out by Russia, France and the United States", a spokesman for Sarkozy's office said.

"[Sarkozy] reminded that we also would like a revival of negotiations with the Six [group of world powers] and with Iran on the whole of the nuclear issue," the spokesman added.

On June 9, The United States, Russia and France and the United States Big powers have notified the UN nuclear watchdog of their concerns about a proposal for Iran to send 1.2 tons of its low-enriched uranium to Turkey in return for reactor fuel.

Diplomats said the three countries listed concerns about the plan brokered last month by Brazil and Turkey, suggesting the response was not an outright rejection of a possible swap under which Iran would get fuel to run a medical reactor.

The United States has said Tehran's decision to back the Brazil-Turkey offer was a ploy to avoid new sanctions on Iran, the world's fifth-largest crude exporter. Diplomats said Iran's proposal lacked practical details needed to carry it out.