Russian President Vladimir Putin has said he does not reject the idea of peace talks on Ukraine.
Speaking after meeting African leaders in St Petersburg, he said African and Chinese initiatives could serve as a basis for finding peace.
But Mr Putin also said there could be no ceasefire while the Ukrainian army was on the offensive.
In the hours after he spoke, Russia said a Ukrainian drone attack on Moscow had damaged two office blocks.
Flights were briefly suspended from Vnukovo Airport, south-west of the city centre, and one person was injured, Russia’s state news agency Tass reported.