The United States and Russia quarrelled in public on Wednesday over the intensifying Ukraine war after US President Donald Trump warned that President Vladimir Putin was “playing with fire” and Moscow massed 50,000 troops near a Ukrainian region.

While world leaders bicker over the prospects for peace, the deadliest conflict in Europe since World War Two is heating up fast: swarms of drones are being launched by both sides while Russia is advancing at key points along the front.

Trump, in a post on Truth Social, said that Putin was playing with fire and cautioned that “REALLY BAD” things would have happened already to Russia if it was not for Trump himself.

“What Vladimir Putin doesn’t realize is that if it weren’t for me, lots of really bad things would have already happened in Russia, and I mean REALLY BAD. He’s playing with fire,” Trump said in a Truth Social post on Tuesday.

Top Russian security official Dmitry Medvedev, a former president, dismissed Trump’s criticism.

“Regarding Trump’s words about Putin ‘playing with fire’ and ‘really bad things’ happening to Russia. I only know of one REALLY BAD thing — WWIII. I hope Trump understands this!” Medvedev wrote in English on the social media platform X.

Trump’s envoy, Keith Kellogg, on Wednesday quoted Medvedev’s post and said it was reckless.

“Stoking fears of WW III is an unfortunate, reckless comment... and unfitting of a world power,” Kellogg said on X.

After speaking to Trump on May 19 for more than two hours, Putin said that he had agreed to work with Ukraine on a memorandum which would set out the contours of a peace accord including the timing of a ceasefire.

Kellogg said that Washington awaited Russia’s draft of a memorandum on a peace accord. Russian Foreign Minister Sergei Lavrov said the next round of talks with Ukraine would be announced soon.

DRONE ATTACKS

Putin ordered tens of thousands of troops into Ukraine in February 2022 after eight years of fighting in eastern Ukraine between Russian-backed separatists and Ukrainian troops.

Russia currently controls just under one fifth of Ukraine. Though Russian advances have accelerated over the past year, the war is costing both Russia and Ukraine dearly in terms of casualties and military spending.

Russia said it had downed 296 Ukrainian drones over 13 regions overnight while Ukraine said Russia had launched 88 drones and five ballistic missiles.

After Russia ejected Ukrainian forces from the western Kursk region, Moscow’s forces have pushed over the border into neighbouring Sumy region of northeastern Ukraine and taken several villages there.

Ukrainian President Volodymyr Zelenskiy said that Russia has gathered 50,000 troops near the northern Sumy region, but added that Kyiv had taken steps to prevent Moscow from conducting a large-scale offensive there.

Putin has repeatedly said he wants a “buffer zone” along Russia’s border with Ukraine.

Russian Defence Minister Andrei Belousov said that the US-led NATO military alliance was using the Ukrainian crisis to build up its presence across eastern Europe and the Baltic but that Russia was advancing along the entire front in Ukraine.