The Syrian army intercepted communications between terrorists and arms suppliers and set up a trap for the mercenaries (the fact that the Syrian army can intercept the most modern western encrypted radio massages used by the terrorists indicates that they use modern Russian technology).
Two weeks prior to the operation, Syrian army engineers planted mines along the road where the terrorists are expected to travel to meet their suppliers; when the terrorists reached the targeted stretch of the road the army detonated the explosives, which was followed up by artillery and infantry fire.
"...The number of carcasses counted so far is 192. This may be adjusted upwards as more rats are found. The number (of) wounded or arrested is 58 with 2 confirmed CIA agents. I still do not know the nationality of the spies. There is a large number of Saudis and Jordanians. Unlike other news sources, I have not received any word of Chechens in the group" writes syrianfreepress.