"The foreign minister of a European Union member state says that Russian President V. Putin could be detained during a flight over this country, and the European Commission's media environment is warning Hungary that it should implement an international arrest warrant," Fico said in a statement released by the Slovak Government Office.

"I have always maintained that the EU has turned into a war cabinet, that a significant part of EU member states support the war in Ukraine in the naive belief that this way Russia can be weakened and even defeated," he added, calling attempts to derail peace talks a "sad sight."

Fico criticized what he called a paradox, where "some leaders are pushing for the Budapest summit" while others are undermining it. He said there were also efforts to include Ukrainian President Volodymyr Zelensky, describing this as "throwing pitchforks into a possible agreement."

The foreign minister referred to by Fico is Poland's Radoslaw Sikorski, who warned that his government could not guarantee Putin's safe passage through Polish airspace, citing the International Criminal Court's arrest warrant for the Russian leader over alleged war crimes. "I cannot guarantee that an independent Polish court won't order the government to escort such an aircraft down to hand the suspect to the court in The Hague," Sikorski told Radio Rodzina.

Sikorski said Poland, as a member of the ICC, is obliged to act if Putin enters its jurisdiction.

"I think the Russian side is aware of this," he added.

"And, therefore, if this summit is to take place, hopefully with the participation of the victim of the aggression, the aircraft will use a different route."

Fico had urged the European Union to do everything in its power to ensure that the Trump-Putin peace summit in Hungary goes ahead "as quickly as possible and without obstacles."