Rumors the Sri Lankan military used chemical weapons

There have been rumors going around that the Sri Lankan military used chemical weapons yesterday in its battle against the LTTE. We do not have proof one way or the other, but two odd points cast doubts on the government. For the first time ever, pictures of the dead LTTE bodies have unusual burn wounds and skin peeling off in many places. In the past the bodies have never had such wounds. Secondly, the Sri Lankan military has blurred out parts of the dead fighters' bodies, most commonly the face (but many faces are also left unblured, so they are not trying to hide the person's identity). There are no signs of blood in the blured out area, so the only logical conclusion is that they want to hide the oddly peeled and burnt skin, which would be most visible on the exposed face. Below are a few examples of these wounds:

In the photo above, why is his chest blurred out? There is no sign of a bullet wound, but you can see a rash or burn around his neck and the blurred area, plus his skin is peeling off on many places.

Why did the Sri Lankan government blur out the faces in the top row, but not the faces below:

What are they trying to hide by blurring out the faces? There are no signs of bullet wounds there, and they obviously aren't hiding their identity, because other faces are being shown. It is possible they are trying to cover up signs of peeling and burnt skin, which would be most visible on the exposed faces.