The Russian Foreign Ministry said on Tuesday that several dozen Russian citizens and citizens of other countries in the former Soviet space had been wounded in recent clashes in Syria and were being treated in Russian hospitals.
Russia's government on Monday insisted there was no evidence that it meddled in the US elections, after Washington indicted 13 Russians for alleged covert efforts to sway voters.
Britain blamed Russia on Thursday for a cyber-attack last year, publicly pointing the finger at Moscow for spreading a virus which disrupted companies across Europe including UK-based Reckitt Benckiser.
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 went down in a snow-covered field, making it difficult to access, with emergency workers forced to reach the wreckage by foot or on snowmobiles.
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.