The fire at the state-owned Polish satellite station broke out on Wednesday night in Wola Krobowska. It remains operational.

The deputy prime minister said it transmits internet traffic through Poland to countries including Ukraine, and uses SpaceX systems that provide connectivity via Starlink terminals.

Asked about the incident at a news conference with Bulgaria’s leader on Thursday, Polish Prime Minister Donald Tusk said he disliked “labelling something as sabotage versus an accident without 100% certainty, but it looks bad”.

On Wednesday Poland also said a Russian military helicopter briefly violated its airspace, forcing it to scramble fighter jets.

Russian President Vladimir Putin has repeatedly said Moscow does not plan to attack Nato states.

Earlier this month, Russian Foreign Minister Sergei Lavrov said it was Europe speaking about preparing for war, adding: “If Europe attacks Russia, it will be a completely different war [from that in Ukraine], and it will be very short.”

Putin launched a full-scale invasion of Ukraine in 2022, and Moscow currently controls about 20% of Ukrainian territory, including the Crimea peninsula annexed in 2014.

In Ukraine, Kharkiv and Kyiv experienced the worst of Russia’s attacks overnight into Thursday.

In Kharkiv, six people were killed and twelve others injured in a Russian strike on a farm in the village of Stara Hnylytsia, Ukraine’s state emergency services said.

It said they were agricultural workers sorting vegetables, with the head of the Kharkiv region adding that four were women.