Pathologists in St Petersburg separated victim's bodys/parts into two groups -- those seated in front and those towards the tail. Those who seated in front sustained mainly chest, stomach, legs, arms injures, internal organs tear. Deaths mainly resulted from loss of blood, shock and brain injures.
Those who seated in the rear were found to sustain explosion injures and heavy burns (more than 90%). Experts attributed this to fuel tank explosion or explosion device detonation. Also a lot of metal pieces and aircraft skin parts were found in body's of those seated in the rear.
This does seem consistent with the fact a lot of fuselage between the wing and tail seems to be missing from the photos seen to date (unless I have missed something).
Media also reporting mid-air heat flash
before crash.
So problem with centre fuel tank? Or bomb?