At least in my book, this significantly decreases the credibility of the claim, though of course the real evidence stands or falls on its own merit.Samantha Power
Meanwhile the RPK has blown up a Turkish checkpoint killing 9 and wounding 60 (numbers dead are likely to grow). It was done with a VBIED. This comes as Turks continue to shell Kurdish positions in Syria, and as Turkish forces along with loyal fighters pour into Syria.
A personal note, I'm not sure the fighters that Turkey is using can be called Syrian rebels at this point. They're paramilitaries trained in Turkey, fighting against all 3 other parties (Assad, ISIS, and the Kurds). Many of them may come from Turkish refugee camps. Then again many may not, and it's hard to judge without looking at the situation on the ground. Either way they're nothing like the indigenous rebels in the urban areas of Damascus.
Взрыв в Джизре - Colonel Cassad
And another thought. The extremely muted Russian and Syrian reply to this act indicate that Turkey got Russian permission if not approval for this action. Given that this is the first time Turkish jets appeared over Syria since the bomber incident (to the best of my knowledge), I think it's a pretty major sign that the Kurds are out of luck. The US is backing Turkey Russia/Assad/Iran have given the green light, and ISIS is retreating rapidly to make a last stand around al-Bab.