demanded that sanctions be immediately lifted when any deal is signed.
Global powers Britain, China, France, Germany, Russia and the United States have said sanctions will only be gradually eased and want a mechanism to ensure they can be swiftly reimposed if Iran breaks its word.
The initial deal to supply Iran with the S-300 missiles was harshly criticised by the United States and Israel.
But Lavrov insisted that the missile system was “exclusively defensive” and said it did not pose a threat to Iran’s foes.
“Does not have attack capabilities and does not put any state in the region in danger, including Israel,” Lavrov said.
Despite the dispute over the S-300 missiles, Moscow and Iran have remained on good terms, with Russia agreeing to build new nuclear reactors for Tehran and both sides supporting President Bashar al-Assad in Syria.
During a visit by Russian Defence Minister Sergei Shoigu to Tehran in January, Iranian military officials said the two sides had “decided to settle the S-300s problem”.
Russia’s state arms company said in February that it had offered to supply Iran with Antey-2500 missiles, an upgraded version of the S-300 air defence system that figured in the previous contract.
As Russia has been hit by Western sanctions over its involvement in the conflict in Ukraine, it has stepped up its economic ties with Iran in the past year.
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