In Ukraine, where incoming drones and missiles are commonplace, some looked at what was happening in Moscow with grim satisfaction.

“It is great that they can feel what we feel every day here,” said Samir Memedov, 32, an account manager in Kyiv who has had to take shelter in a subway station during Russian attacks this week.

Another Kyiv resident, Yulia Honcharova, said she had mixed feelings.

“I’m not among those who believe that we should bomb their residential quarters at night,” she said, “but I do want them to feel what it is like to live under constant alarms, like people live in Kyiv, Kharkiv, Dnipro.”

Reporting was contributed by Victoria Kim, John Ismay, Marc Santora, Matthew Mpoke Bigg, Andrew E. Kramer, Eric Schmitt and Anna Lukinova.