I assume it was an IED, but I don't know where. Syria, or Yemen probably, maybe Iraq? Wherever it was, some real toaster strudel action unfolding right here.
It was Syria..
According to reports, the blast killed two soldiers in the targeted vehicle and seriously wounded a third. The event took place in Der Ezzor countryside, which means the device was likely planted by the Islamic State. The source also indicates that the IED was probably planted a “long while ago,” which indicate that it was triggered by a pressure plant, rather than command detonated by a nearby triggerman.