Church insiders said the attack, which happened late Thursday in southern Moscow, could have been the work of radical Islamists.

Gazprom wants to take over GdF Suez's 5.3 percent stake in VNG, in exchange according GdF a participation in the planned Nord Stream pipeline under the Baltic Sea.

The Alrosa, a diesel-electric submarine, was on a training exercise when the problem occurred, the agency quoted a source at the Russian Black Sea fleet as saying.

Regional police spokesman Mark Tolchinsky said Sunday that police shot the militant late Saturday on a highway in the Buinaksk district of Dagestan.