Foreign forces involved?
-The attack was allegedly carried out by a former Assad agent, and in this case it is very dangerous situation where the regime is starting to be shaking and maybe even falling apart, Younes Abouyoub, a research scholar at Columbia University, told RT.
But there is more than one version of the event, he added.
"May be there is a larger intelligence operation involving foreign intelligence services," he said. "First of all the timing of this work, the way it was carried out, the fact that it's targeted three major figures within the regime – this shows that these are professionals, not amateurs. This is not someone who just did it by himself, or as they try to portray it, one suicide bomber acting on his own. This is not the act of one person or two, this is a very carefully planned and well-organized and implemented operation."
War correspondent Eric Margolis agrees that the operation was too well-prepared to be carried out by an amateur, because such a gathering of high-profile officials would normally have the toughest security, making it impossible for a single suicide bomber to infiltrate.
"There may have been explosives hidden there before the meeting," he said. "I have covered a lot of these kind of explosions and it seems to me that the damage done, or that's being reported, has far exceeded the damage that can be caused by one man carrying a suicide vest."