Russian President Vladimir Putin and Saudi King Abdullah on Sunday discussed international issues over the phone, the Kremlin said in a statement.
According to UN statistics, more than 100,000 people have died in the 2 1/2-year civil war in Syria. The number of refugees caused by the conflict hit 2 million in September.
Western countries suspect Iran of using its nuclear program to develop atomic weapons, a claim that Iran has consistently denied. Tehran claims it needs atomic technology for producing electricity, although it has some of the world’s largest reserves of oil and gas.