This is an interesting source from Syrian Arab News
http://sana.sy/en/?p=103798
What its suggesting is, there needs to be a full investigation for this chemical attack and that nobody, including the U.S can point a finger at anyone until that investigation is done. It also suggests that the U.S is not destroying ISIS but using ISIS as an excuse to go in and target the Assad regime.
It also states that Khan Sheikhoun is under the control of Jabhat al-Nusra terror organization, but there are western attempts to hide that, adding that it’s not a coincidence that reports about terrorists stockpiling chemical weapons and using them against civilians are being ignored. In doing so the U.S are in violation of the UN Charter.