I'm with Edward: Putin's instant impulse to connect this tragedy with Chechnya and his demand that there not be "any double standards whatsoever in assessing bloody crimes similar to those carried out today in London” is a sickening response to the morning's attacks.
The guy's a standard-issue autocrat desperate to achieve a veneer of democratic and moral legitimacy, and without actions that actually possess such qualities, he's consigned himself to asserting lame linkages between his transgressions and the Western World's troubles.
What happened today was not carried out by all Muslim movements everywhere. It was the act of a single cell of a single organization attempting to prove it's not been broken. For Putin to pervert it before the dead are cold and counted is a pathetically transparent attempt to gain moral flexibility in boosting Chechnya's death toll. It's murder levied to legitimize killing, and Putin should be roundly condemned for it.