But there is division over whether President Putin's actions are to be condemned or applauded, BBC Russian reporters discover.
When two young well-dressed men stop to chat to the BBC, one of them appears fairly relaxed about the invasion of Ukraine.
"Yes, we heard something but haven't had a chance to understand what's going on," he says.
But he is soon interrupted by his friend, swearing as he does so.
"We are shocked," he says. "We have never seen war in our lifetime and we are about to see one."
A man in a bright blue coat looks miserable.