The Kremlin said on Tuesday that a Ukrainian drone attack on a presidential residence in the Novgorod region would toughen Russia's position on a possible peace deal to end the fighting.
Ukrainian President Volodymyr Zelenskyy has dismissed the Russian accusations as "another round of lies" aimed to justify additional attacks against Ukraine and to prolong the war.
Kremlin spokesman Dmitry Peskov noted Ukraine's denial of the drone attack - and said that many Western media were playing along with Kyiv's denial.
"This terrorist action is aimed at collapsing the negotiation process," Peskov told reporters. "The diplomatic consequence will be to toughen the negotiating position of the Russian Federation."
The Russian military, he said, knew how and when to respond.
"We see that Zelenskyy himself is trying to deny this, and many Western media outlets, playing along with the Kyiv regime, are starting to spread the theme that this did not happen," Peskov said. "This is a completely insane assertion."
Peskov declined to say where Putin was at the time of the attack, saying that in light of recent events such details should not be in the public domain.
When asked if Russia had physical evidence of the drone attack, he said air defences shot the drones down but that the question of wreckage was for the defence ministry.

Putin says US-Russia contacts beneficial as talks begin with Witkoff and Kushner
Chinese national rescued from Nepal tunnel 10 days after flash flood
US envoys Witkoff, Kushner arrive in Moscow for talks on peace in Ukraine
One dead, 11 people missing after mudslide in China's Jiangxi province
Philippine VP Duterte posts bail after arrest order for alleged grave threats
Lindsay Clancy trial over killing her children ends in mistrial
Israel says it strikes southern Lebanon after Hezbollah drone launch
Sydney sweats in spring hot spell, faces 'extreme' bushfire risk
