In a video, shot in the area of Latakia in Syria where hostilities between government forces and militants are underway, one can see a Russian BTR-82A armored car - one of Russia's most advanced army vehicles which was only launched last year.
Between 2:00 and 2:15 in the video, you can supposedly hear Russian speech.
Moreover, there are other evidence of Russian troops presence in Syria. For example, the Syrian Jabhat al-Nusra, branch of Al-Qaeda, put on its Twitter photographs with drones and planes in the sky over Syria, being very similar to those of Russia.
In late August, web outlet Bosphorus Naval News published photos of the Russian ship "Nikolai Filchenkov" heading south through the Bosphorus, carrying large amounts of military equipment: KamAZ trucks and other disguised hardware, with at least 4 APCs being vaguely seen.
According to the media, an unnamed activist with the Syrian rebel group the Free Syrian Army confirms presence of Russian troops: "The Russians have been there a long time.
There are more Russian officials who came to Slunfeh in recent weeks. We don't know how many but I can assure you there has been Russian reinforcement."
Syrian President Assad, in his turn, said last week that he trusts Russia's support, because it proved its sincerity and transparency over four years into the crisis.
The White House said it is closely monitoring the reports.
However, Russian UN Ambassador Vitaly Churkin gave a non-committal explanation: "The most important thing is to make sure we know what is going to happen and the mechanism will work as effectively as it can," The Telegraph reports.