KUBINKA (Moscow region), September 6. /TASS/. Tehran has fully withdrawn its lawsuit filed against Russia on the S-300 missile systems, Vladimir Kozhin, Russia’s Presidential Aide for Military Technical Cooperation, told TASS on Tuesday.

"Yes, it has been withdrawn," he stated.

In May, Kozhin told reporters that Iran took all necessary steps to withdraw the lawsuit, but some "legal procedures" had still remained.

In 2007, Tehran announced the purchase of the Russian S-300PMU-1 systems. However, in 2010, Russia’s then president Dmitry Medvedev banned the delivery of these weapons to Iran. As a result, Tehran filed a lawsuit against Moscow worth nearly $4 billion. 

Later, Iran lodged a $4 billion lawsuit at an international court in Geneva against Russia’s arms export agency over Russia’s nonfulfillment of its obligations under the contract. 

In spring 2015, Russian President Vladimir Putin lifted the ban on the S-300 missile system delivery to Iran.

Earlier reports said that S-300 supplies to Iran would be completed by the end of 2016.

S-300 (NATO reporting name SA-10 Grumble) is a missile defense system designed to fire surface-to-air missiles at aerial targets such as helicopters, warplanes and cruise or ballistic missiles.