Excerpt:
An Islamist militant group based in Russia's North Caucases has claimed the killing last month of an Orthodox priest who was an outspoken critic of Islam.
"One of our brothers who has never been to the Caucases took up the oath of (former independent Chechen president Doku Umarov) and expressed his desire to execute the damned Sysoyev," said a statement on the Kavkazcenter.com website.
Daniil Sysoyev, 35, was killed on November 20 when masked gunman walked into Saint Thomas's church in southern Moscow and shot him four times.