Western analysts believe that Israel may be forced to attack other weapon shipments in Syria as Russia says that it will remain committed to previous weapons deal with Damascus.Russia’s Foreign Minister Sergey Lavrov said on Thursday that Moscow would remain committed to previously signed arms deal " regarding agreements pertaining to aerial defense weapons. " The Russian Foreign Minister added, however, that Russia would not sign any new deal with Syria. This is whileThe New York Timesreported earlier that Moscow has sent upgraded anti - ship cruise guided missiles, Yakhonts, to Syria which could be used to fight any seaborne attack by the US and its allies. According toThe Guardian, experts believe these systems would be a powerful defense against any effort to enforce a naval embargo on Syria or launch aerial attack against the country. Meanwhile, CIA chief John Brennan made a visit on Friday to Israel to meet Israeli Prime Minister Binyamin Netanyahu and other senior officials following Tel Aviv’s recent attacks against Syria. On May 5, Syria said the Israeli regime had carried out an airstrike targeting a research center in a suburb of Damascus, following heavy losses of al-Qaeda-affiliated groups at the hands of the Syrian army. According to Syrian media reports, Israeli rockets struck the Jamraya Research Center. The Jamraya facility was also targeted in an Israeli airstrike in January. The May 5 attack came shortly after Tel Aviv confirmed that its warplanes had hit another target in Syria on May 3.