SWJED you beat me to it, I just got off the CT Blog. The smoke hasn't cleared yet, so everything falls in the category of speculation, but as this investigation unfolds it definitely needs to be followed. If the police did this it would explain the infrastructure, but Thai police (although they can be rough) aren't in the habit of killing incident Thai civilians. If they did escalate their rift with the Army to this extent, then we have serious security concerns in the Kingdom. If it was the separatists from the South, then it was obviously a warning shot in hopes of getting concessions, or provoking the Thai government into over reacting so they can garner more political support. Numerous third options also exist, but Zachary Abuza is a noted expert on the region, I look forward to his next post and analysis.