President Assad alongside President Putin.
President Vladimir Putin says the air strike conducted by the US, UK and France on Syria will only worsen the country's humanitarian crisis.
In a statement issued by the Kremlin, Russian president Putin said Moscow is calling an emergency meeting of the UN security over the strike launched by the US, UK and France.
Mr Putin denounced the strikes as an "act of aggression" that will exacerbate Syria's humanitarian catastrophe.
He added that the strike had a "destructive influence on the entire system of international relations".
The strikes from the three countries came in response to an alleged chemical attack on the Syrian town of Douma, something which Mr Putin reaffirmed as a fake.
Mr Putin added that Russian military experts who inspected Douma found no trace of a chemical attack.
He criticised the US and its allies for launching the strike without waiting for inspectors from the international chemical weapons watchdog to visit the area.
However, the World Health Organization said in a statement that reports from their Health Cluster partners showed that the strike had left an estimated 500 patients showing signs and symptoms of being exposed to toxic chemicals.
Meanwhile, the Russian military said Syria's Soviet-made air defence systems downed 71 out of 103 cruise missiles launched by the US and its allies.
Colonel General Sergei Rudskoi of the Russian military's General Staff, said Saturday's strike has not caused any casualties, and Syrian military facilities targeted by the US, UK and France have suffered only minor damage.
He added that Russian air defence assets in Syria monitored the strike but did not engage any of the missiles.
Colonel General Sergei Rudskoi said the Syrian military used the Soviet-era air defence missiles with high efficiency, shooting down all missiles aimed at four key Syrian air bases.
He went on to say that in the past, Russia has refrained from providing Syria with their state-of-the-art S-300 air defence missile systems at the insistence of the West but that decision could now be reconsidered.