Russia says a step-by-step approach should be used to end international doubts over Iran's nuclear program.
Sergei Lavrov said every time Tehran satisfactorily answered a question or concern of the International Atomic Energy Agency, it should be rewarded, including the freezing of some sanctions.
"We propose that for each IAEA concern that Iran must address, starting with the easier issues before ending with those that may take more time, that for each specific step of Iran would be followed by some reciprocal move, like freezing some sanctions and shortening the volume of sanctions," Lavrov said.
Lavrov was speaking after talks in Washington with U.S. Secretary of State Hillary Clinton, who did not directly address Lavrov's offer, but said Washington remains committed to a "dual track of pressure and engagement" on Iran.
Tehran says is ready to restart talks with the five permanent Security Council members and Germany but only after its right to enrich uranium is recognized.
Talks in Geneva in December and Istanbul in December between the six powers and Iran failed to make headway.
Some Western countries fear Iran is using its nuclear program to develop nuclear weapons, a charge Iran strongly denies.
compiled from agency reports