Russian President Vladimir Putin is hosting Israeli Prime Minister Benjamin Netanyahu for talks focusing on the situation in Syria, amid concerns that Moscow could soon provide Damascus with advanced missiles.

Israeli officials have asked Russia to stop what they say is an imminent delivery of Russian S-300 air defense systems to Syria. Putin told Netanyahu at the start of their meeting in the Black Sea resort of Sochi Tuesday that they would have a chance to talk about Syria. Neither leader mentioned the missiles in brief opening remarks.

Russia has continued to ship weapons to Syria despite the civil war there, but it so far has refrained from providing Damascus with the S-300s, a powerful weapon that has a range of up to 200 kilometers (125 miles).