Moscow announces sudden large-scale military exercise of its Northern Fleet owing to increasing security threat.
President Putin has not been seen in public for 10 days, leading to rumours of strokes and coups.
Four other men arrested all deny involvement in the murder of the prominent Putin critic.
Putin's regime has been pilloried the world over, and he must hold an immediate inquiry to repair the damage.
Foreign Minister Abdullah bin Zayed al Nahyan says defence deal covers only sharing of technology.
Nemtsov's supporters claim killing was 'politically motivated' while Moscow begins investigation.
The 55-year-old politician was shot four times by an unidentified attacker near the Kremlin.
Closer ties between Athens and Moscow, or Athens and Beijing are something Western powers will not want, says Marc Faber.
Security Service of Ukraine official says four detained suspects were using Russian-made weapons..
Planned strategic reserve of natural gas and fuel oil will cover local needs in emergency situations.
BREAKING: Fate of the two pilots remains unknown as Moscow presses search and rescue measures to locate the tactical bomber.
Moscow has warned that Nato's latest expansion in eastern Europe could lead to "military confrontation" in the region.
OCSE-led peace talks in Belarusian capital fail to secure ceasefire agreement dashing hopes.
Yuri Pivovarov, the institute's director, which branded the fire a 'disaster' said the extent of the damage remained unclear
Security forces in Mariupol in eastern Ukraine remain on high alert over raging fighting.
Pro-Russian separatist leader determined to take on Ukrainian forces amid simmering conflict in the eastern region.
Kiev says Russia deploying military personnel and weapons in eastern Ukraine amid raging Donbass conflict.
Putin's call comes as Ukrainian president Petro Poroshenko vows to recapture all territories in eastern region from pro-Russian separatists.
Punk singer one of 100 people detained following pro-Navalny demonstration near Red Square.
Data collected by Jawbone fitness trackers reveal Brits are likely to be asleep by 2am this New Year's Eve.
Moscow lists Nato alliance as top security threat in revised military doctrine.
Hundreds of prisoners freed in rebel stronghold Donetsk after deal facilitated by OCSE.