Russian lawmakers have called for a thorough investigation on the origins of the man-portable missile launcher that was likely used by militants in Syria to shoot down a Russian fighter jet before killing the pilot in a firefight.Frants Klintsevich, First Deputy chair of Russia's Federal Council Defense Committee, told Interfax.As far as military losses go,Klintsevich said. While explaining the incident to the media, Russia’s Defense Ministry went on to say: “A series of high-precision weapon strikes have been delivered in the area controlled by the Jabhat al-Nusra terrorist group, which brought down the Russian Su-25 jet by using a portable anti-aircraft missile system in the Syrian province Idlib.”

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“According to radio intercepts, more than 30 Jabhat al-Nusra militants were killed,” Media quoted the ministry as saying. MOSCOW — A Russian fighter jet was shot down in a rebel-controlled area of Idlib Province in northern Syria on Saturday, Russia’s Defense Ministry said, adding that the pilot survived the initial attack by parachuting from the plane but was killed by members of a militia on the ground.
The Interfax agency states that Russia retaliated with a missile attack, killing at least 30 Al-Nusra militants in North-West Syria with "precision-guided weapons".