A couple of days ago I wrote about the bombings in Moscow and my suspicion that the Russian security services themselves were behind the attack. My theory wasn't based on any particular facts about the case itself, but rather the Kremlin's long history of committing false flag attacks in the name of terrorists from Russia's North Caucasus.
No more details about the attack have emerged to support this theory (though I suppose they will in the coming months and years, if not sooner), but apparently the Russian blogosphere shares my sentiments:
It is too early to say who organized this terrorist attack. Russian bloggers discuss mainly two versions: Chechen rebels and the state security services. However weird it may sound, the latter version is at least as popular as the former one.
Naturally, no English-language newspaper or magazine has even raised the possibility. I really wish I could read Russian, so that I could investigate the bloggers' claims and accusations, but as it is I'm stuck reading filtered versions of what actual Russians are thinking.
Edit: The NYT has an angle that I hadn't picked up on – while the small-scale, little-reported but quite frequent bombings in the Caucasus (like the one today in Dagestan) almost always targeted police and government officials, the metro bombings was obviously meant to kill civilians. This is probably the most compelling reason to think that it wasn't committed by an insurgent group – people are much more likely to sympathize with terrorists who attack the government than those who attack ordinary (and relatively poor, if they're using mass transit) people.