Could be, though I think we'd have been at least generally familiar with the effects of one of our own warheads, even if reverse-engineered and upgraded [as we did with the Soviet SA-7 *Strella*] by a foreign source. The Russian Copy of the M72A2 LAW as their RPG-18 Mukha comes to mind....
But the Brits use the TOW in at least limited numbers as well, though they favour the MILAN for dismounted Infantry use. I wonder if they might have misplaced any new goodies from their boffins while they were in the area during Operation Telic.