Russian President Vladimir Putin’s decision to remove restrictions on shipping the S-300 surface-to-air missiles also appears to reflect policy shifts after a framework reached earlier this month to limit Iran’s nuclear program in exchange for easing international sanctions.

“We believe that at this stage the need for this kind of embargo, particularly a voluntary, Russian embargo, has completely disappeared,” Russian Foreign Minister Sergey Lavrov told journalists, according to Russian news service Interfax.

It remained unclear, however, whether other potential obstacles remained for the delivery of the S-300 batteries to Iran. The deal has been strongly criticized by the United States and its allies.

Russia signed the $800 million contract with Iran in 2007, but later called off the pact three years later because of Western objections and international sanctions over Iran’s nuclear program.

Iran had filed a $4 billion lawsuit in Geneva against Russia alleging Moscow failed to honor its contract for the S-300s, which are Russia’s main air defense system.

Russia’s decision comes a day after the leaders of Israel’s liberal opposition party Zionist Union called for “understanding” from the United States that Israel could carry out military strikes on Iran if it violates the potential nuclear accord.

Negotiators from Iran and world powers, including Russia and the United States, hope to reach a final accord by the end of June.

But Lavrov said the missiles could be shipped out “promptly” if Russian officials make a political decision to act before a full nuclear deal is reached.

Lavrov also stressed that the S-300s would “not jeopardize the safety of any state in the region, including, of course, Israel.”

Israel worries that its military advantages in the region could be further eroded by the introduction of the S-300 systems in Iran and elsewhere.

Iran has developed many of its own military equipment and arsenals, including missiles and drones. But it has depended heavily on designs and expertise from China, Russia and elsewhere.