His words triggered criticism from opposition politicians in Poland.

"The Polish ambassador to France saying we will enter a war with Russia if Ukraine fails is clearly exceeding his powers and should simply be removed from office. Hello [foreign ministry]!" tweeted Maciej Gdula, an MP from The Left (Lewica).

"The PiS [ruling party's] diplomatic staff are a disaster. They put forward people with no experience in diplomacy as ambassadors, and they later say whatever comes to mind," wrote Krzystof Bosak, one of the leaders of the far-right Confederation (Konfederacja) party.

It's likely his words reflect the sentiment (and possible plans) of some of his colleagues. One recalls the recent comment from Germany's FM: Germany 'at war' with Russia - FM

"Looking for sensational content that does not fit with Poland's consistent efforts over the past year to help Ukraine win this conflict so that it would not spill over into Europe and Poland should be regarded as ill will," it added.

Although the Polish foreign ministry did not directly address the ambassador's statement in a separate communication, it retweeted the embassy's message.

Rościszewski's remarks came as one French politician, National Rally (RN) MEP and former minister Thierry Mariani, accused Poland of "clearly trying to drag the European Union into an escalation" of the war in Ukraine.

His comments came in response to Poland's president, Andrzej Duda, last week announcing that his country would become the first to transfer fighter jets to Ukraine.

"It seems to me that it is extremely dangerous for Poland to deliver military aircraft to Kyiv," Mariani told Russian state news agency TASS. "Until now, the United States has not made such a decision. Warsaw is now going even further than Washington in supplying Ukraine with military equipment."

Poland has long argued that helping Ukraine's defend itself against Russian aggression is vital for the safety of Europe, and in particular of NATO's eastern member states.

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The biggest demonstration of the ICC's impotence was its failed attempt to investigate war crimes committed by US troops in Afghanistan and Iraq, Medvedev stated.

Washington derailed the court's probe. John Bolton, the national security adviser under then-President Donald Trump, mused at the time that "for all intents and purposes, the ICC is already dead," so Washington will allow it to "die on its own."

Last week's decision by the ICC's Pre-Trial Chamber to go after the leader of another nuclear power that likewise refused to recognize its jurisdiction is obviously just for show, Medvedev said, adding that this will only serve to eradicate whatever trust in international institutions remains.

Nations ignore rulings that they perceive as inherently unjust and prefer to make direct agreements between each other, while "stupid decisions of the UN and other structures come apart at the seams."

Medvedev added that one could "imagine a situation" in which the building of the ICC in The Hague could be struck by a Russian hypersonic missile. "This court is just a puny international organization, not a NATO nation's people. They would not dare to start a war over it. No one would even be sorry about it."

The Russian leadership has taken note of the arrest warrant for President Vladimir Putin announced by the International Criminal Court (ICC) last week but is not worried by it, Kremlin press secretary Dmitry Peskov has said. It is just one of many attacks on Russia and its leader, he explained.

"We take notice [of such things], but if we were to take to heart every hostile action, certainly nothing good would come out of it. We are unfazed and will keep working."

The court acts on the authority of the Rome Statute, an international treaty that Russia never ratified and from which it fully withdrew in 2016. Several other major world powers, including the US, China, and India, do not recognize the ICC either. Washington infamously derailed the court's attempt to investigate war crimes allegedly committed in Iraq and Afghanistan by US troops and their allies under President Donald Trump.

The Russian government dismissed the arrest warrant as irrelevant. Former President Dmitry Medvedev, who currently serves as deputy chair of the National Security Council, called the court earlier on Monday a "puny international organization."