The Iranian ambassador to Russia, Mahmoud-Reza Sajjadi, has said Iran will withdraw its $4bn lawsuit against Moscow, if Russia honours the S-300 surface-air-missile (SAM) systems delivery contract, signed in late 2007.
Speaking to Russian Izvestia daily, Sajjadi said that Iran and the Russian Federal Service are likely to re-start discussions to sort out the issue.
Iran's Ministry of Defence (MoD) and the Aerospace Industries Organization sued Russia's state-arm-exporter Rosoboronexport in the Geneva International Court of Justice in April 2011, demanding the company either honour the contract or pay compensation.
According to Sajjadi, Iran had demanded compensation of $900m for Russia's failure to honour the contract, but an additional $3bn was added by the court, bringing the claim to $4bn.
Tehran ordered a total of five S-300 systems from Moscow under an $800m deal in 2007, but the contract was cancelled by former Russian president Dmitry Medvedev following a fourth UN Security Council arms embargo on Iran in June 2010.
Moscow has already returned Iran's deposit of $166.8m for the systems, but Iran maintains that the surface-to-air missile systems do not fall under the UN Security Council Resolution 1929.
The UN-imposed embargo banned the supply of missiles, missile systems, tanks, fighter helicopters, fighter jets and warships to Iran.
Code-named Favorite, the S-300 is a mobile, long-range air defence system designed to detect, track and destroy incoming cruise missiles, ballistic missiles and high and low-flying aircraft.
Developed by NPO Almaz Bureau, the high-precision missile system is capable of tracking up to 100 simultaneous targets from a distance of 150km.
Image: A Russian S-300 anti-aircraft missile system being displayed at a military parade in Moscow. Photo: courtesy of kremlin.ru.