Damascus Bombing Still Mysterious

Nothing new has come to light regarding the recent car bombing in Damascus, but the fact no one has assumed responsibility leads me to believe it isn't a Sunni militant group based in Lebanon, as some claim. I'm also not the only one who reads potential responsibility into the possibility that Brigadier General Abd al-Karim Abbas was around the explosion:

"Some political analysts IWPR spoke to have suggested that the bombing was a consequence of a power struggle between rival Syrian security services.

"One political writer in Damascus argued that the theory will be given even more credence if there’s confirmation of rumours that one of the bomb victims was Syrian general Abdul Kareem Abbas, who was being investigated by the United Nations International Independent Investigation Commission in connection with the assassination of former Lebanese premier Rafik Hariri. The authorities have so far insisted that only civilians were killed...

"Another political writer points out that the proximity of the explosion to a major security building also gives weight to claims that it was linked to a domestic power struggle."

If Abd al-Karim Abbas is still alive, would he please make himself known to the commentariat?