Kremlin spokesman Dmitry Peskov said on Tuesday that Russia had not yet seen a clear formulation of Ukraine's proposal, according to Russian media reports.
"Zelenskiy should take responsibility and make an appropriate decision so that we can achieve peace - and not just a ceasefire," Peskov said.
Zelenskiy floated a potential Easter ceasefire on Monday but presented it in multiple versions without specifying a date.
Catholic and Protestant Christians celebrate Easter Sunday this weekend while Orthodox Christians, such as those in Russia and Ukraine, do not celebrate until April 12.
"It is clear that the Kyiv regime urgently needs a ceasefire, any kind of ceasefire, because the dynamics on the front lines - which, incidentally, are being observed not only by our own but also by foreign experts - show that Russian troops are advancing - sometimes faster, sometimes slower - but along the entire front line," Peskov was quoted as saying.
During temporary ceasefires in the past, the warring parties have repeatedly accused each other of violations.
Furthermore, both sides accuse each other of using such periods to redeploy troops and rearm.
Following reports of Ukrainian drones crashing in European Union countries in the Baltic region, Peskov also issued a warning to neighbouring states.
"Should countries make their airspace available for 'hostile terrorist acts against the Russian Federation,' this obliges us to draw the appropriate conclusions and take the necessary measures," he said.
Ukraine has been fending off a full-scale Russian invasion for more than four years.
A group of 12 European foreign ministers visited Ukraine on Tuesday to mark the fourth anniversary of atrocities committed in a town near Kyiv by Russian forces.
Russian troops quickly occupied the town after launching a full-scale invasion of Ukraine on February 24, 2022.
They stayed for about a month.
The foreign ministers, as well as numerous lower-ranking officials, arrived by train in Kyiv where they were welcomed by Ukrainian Foreign Minister Andrii Sybiha, who noted the "grim anniversary" of the atrocities in Bucha.
Zelenskiy said that he would hold a video call on Wednesday about ways to end Russia's invasion, with US negotiators as well as NATO Secretary-General Mark Rutte joining in.
US representatives will include Steve Witkoff, Jared Kushner and US Senator Lindsey Graham, he said.
with AP
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