Moscow’s Domodedovo airport – the busiest in the Russian capital – has been rocked by an explosion that has reportedly killed 31 people. Suspicion has fallen on the “Caucasus Emirate”, an Islamist separatist movement in Chechnya. More than 100 more are thought to have been injured in the blast, which reports suggest may have been the work of a suicide bomber. Russia’s chief... 

Chechen rebels claimed responsibility Wednesday for last week’s Russian train bombing, which killed at least 26 people and injured scores of others, a Web site sympathetic to the militants said. The claim, posted on the Kavkazcenter.com site, could buttress the suspicions of officials who are tracing the attack to Islamist separatists in Russia’s North Caucasus region. It also raises fears...