On the streets of Moscow yesterday, the dominant mood regarding the Sinai air crash appeared to be a mix of scepticism, caution and implacable hostility towards Isis (Islamic State).
Above all, many Russians seemed hesitant to draw any conclusions about the causes of disaster, or to tie it to Moscow's airstrikes in Syria.
"You want me to say it was a bad idea to bomb Syria? Personally I think it was high time we destroy Isis," said a woman who gave her name as Tatiana Vladimirovna.
"Isis is horrible, they're worse than Hitler. They're destroying people, they're destroying their history," said Natalya Petrovna. "Have you watched TV? They're now engaged in recruiting our girls.
"Do you think comrade Putin will let them take down our planes just like that?" she said when asked about the possibility of terrorist attacks in revenge for Russia's campaign in Syria. "Our military looks pretty good now compared to others."