Israeli Prime Minister Binyamin Netanyahu arrived in Russia Tuesday  to discuss the volatile situation in the Middle East with Russian President Vladimir Putin.
Putin said at the start of the talks he expects their discussions to focus on Syria but he failed to mention Russia's planned sale of S-300 anti-aircraft systems to the war-torn nation , RIA Novosti reported.
A high-ranking source in Jerusalem told the official Russian news agency Netanyahu  is likely to ask Putin not to follow through with the sale.
Syria has already made the first payment on a $900 million deal for six launchers and some 144 missiles, Haaretz reported.
Also on the agenda will be a discussion of Iran's nuclear program .