Thousands marched through central Moscow on Sunday to commemorate murdered Russian opposition leader Boris Nemtsov, calling for President Vladimir Putin to be ousted just three weeks before a presidential election.
Moscow on Wednesday said it would be "very difficult" to improve US-Russia relations, which have plummeted to Cold War lows on accusations of election meddling and crises in Syria and Ukraine.
Russian experts probing the weekend plane crash outside Moscow which killed 71 people said the accident may have been caused by ice on speed probes which led to faulty information on the craft's airspeed.
The Antonov An-148 plane operated by the domestic Saratov Airlines was flying to Orsk, a city in the Urals, and crashed in the Ramensky district on the outskirts of Moscow.
Moscow authorities battled to clear streets and told children they could skip school as the city was blanketed by its heaviest snowfall in 100 years.
Five people were killed when a city bus ploughed into a pedestrian underpass in western Moscow on Monday, traffic police said.
Several people were killed and injured after a corner section of a nine-storey, Soviet-era residential building collapsed in the provincial city of Izhevsk, Russian authorities said Thursday.
The General Civil Aviation Authority (GCAA) said its air accident investigation unit is treating the September 10 episode as a "serious incident”, an internationally recognised category which means an accident "nearly occurred”.
Moscow on Monday slammed new US sanctions on Venezuela, saying they were aimed at damaging the Latin American nation's economy and aggravating tensions.
The US on Tuesday cleared out of two diplomatic compounds around Moscow under the first stage of punitive measures imposed by Russia in retaliation for new sanctions being readied in Washington.