"Our common goal is to identify, prevent and neutralize threats arising from sabotage, for which Russia is known, and not only in Poland," Tusk said today on the sidelines of a scientific congress in Warsaw, according to the Polish news agency PAP.

He added that Poland is well aware of who is behind such threats, and that these are enemies of both Poland and Ukraine.

Zelensky, who is currently on a visit to Turkey and spoke with Tusk by phone, announced on the X network after their conversation that"all facts indicate that Russia is behind the sabotage". According to him,"not a day goes by in Ukraine without some potential Russian sabotage being revealed".

"Ukraine is ready to cooperate with Poland at various levels and share all information. We agreed to establish a Ukrainian-Polish group that will work to prevent similar situations in the future. We appreciate all the help from Poland and are ready to cooperate," he added.

Explosion on the railway line between Warsaw and Lublin

Poland was the target of sabotage last weekend - an attack with an explosive device on the railway line between Warsaw and Lublin in the east of the country, through which allied aid is being delivered to Ukraine.

Poland has identified two Ukrainian citizens who have long been cooperating with Russian intelligence services as the perpetrators, Tusk explained on Tuesday. Foreign Minister Radoslaw Sikorski said today that Poland will request the extradition of both suspects.

Meanwhile, the Polish prosecutor's office has filed an indictment against two Ukrainians suspected of sabotage on the railway line.

They are accused of"acts of sabotage of a terrorist nature on behalf of Russian intelligence services committed against Poland, causing danger and a potential serious traffic accident, and using explosive devices," prosecutor Przemyslaw Nowak explained, according to PAP. He added that if convicted, they could face life imprisonment.

The Polish intelligence service also announced today that several other people who may be linked to the sabotage have been arrested in Poland. They did not want to give further details as the investigation is still ongoing, said Jacek Dobrzynski, a spokesman for the internal security service.