Lavrov said there were no casualties or material damage and warned that Russia would respond. He said the development would force Moscow to reassess its negotiating position, though he noted Russia would not withdraw from ongoing talks related to a possible peace deal with Ukraine.

Ukrainian President Volodymyr Zelenskyy dismissed Russian accusations that Kyiv had tried to attack a residence used by President Vladimir Putin. He said Ukraine targets only legitimate military sites in self-defense. He added that any plan to end the conflict must involve Ukraine, Russia, the United States and Europe, and that Ukraine is open to all forms of talks.

US President Donald Trump said President Putin had informed him of the alleged attack during a phone call on Monday morning. Trump said the military action could increase tensions, but added that the United States has not independently confirmed the incident.