Via the Independent:
Security sources have named an ethnic Russian Christian who converted to Islam as the prime suspect in Monday's deadly suicide bombing at a Moscow airport.
Sources close to the investigation said that Vitaly Razdobudko, a 32-year-old from the southern Russian city of Stavropol, was being sought in connection with the attack, the Kommersant newspaper reported yesterday. It is not known whether Razdobudko is suspected of being the actual suicide bomber or an accomplice.
Razdobudko went missing in October last year, with his wife, according to police sources in Stavropol. He is believed to have been an Orthodox Christian, of Slavic appearance, who later converted to Islam.(source)
