WARSAW

Damage caused overnight on the intercity Warsaw-Lublin rail line near the village of Mika was an act of sabotage, Polish Prime Minister Donald Tusk posted on US social media company X on Monday.

"Unfortunately, the worst suspicions have been confirmed. An act of sabotage occurred on the Warsaw-Lublin line (village of Mika). An explosive device detonated and destroyed the railway track. Services and the prosecutor's office are working on the scene," the prime minister wrote.

The prime minister added that another incident on the same line, near Pulawy southeast of Warsaw, may also have been sabotage. Security services are investigating whether the events fit into a broader pattern of hostile activity targeting Polish infrastructure.

Early Sunday, a train driver reported “irregularities” on the Deblin–Warsaw route near the village of Zyczyn, around 100 kilometers (60 miles) from the capital, according to police in Radom. Initial checks revealed deliberate damage to a section of track, prompting an immediate suspension of traffic.

Tusk said he remained in “constant contact” with Interior Minister Tomasz Siemoniak and that sabotage could not be excluded. “It cannot be ruled out that we are dealing with an act of sabotage,” Tusk wrote on X, adding that no one had been injured and that investigators were treating the matter with the highest urgency.

The Internal Security Agency and police investigators were dispatched to the site. Jacek Dobrzynski, spokesperson for the security services, told PAP the case was being handled as “an absolute priority.”

Deputy Interior Minister Maciej Duszczyk told Polsat News that Poland had faced “many different acts of sabotage in recent months,” and that the latest incident “may have been one of them.”

While urging caution and saying authorities were not confirming witness claims of a possible explosion, he added: “We have a damaged track, and it did not damage itself. Someone must have caused it.”

He also warned against reflexively blaming Moscow for every disruption. “Russia is not so powerful that every fire or every incident is provoked by them,” he said. “But nothing can be ruled out or ignored.”

Earlier in the day, Interior Ministry spokesperson Karolina Gałecka said there were initially no definitive signs of deliberate damage, though later statements from officials emphasized sabotage as a strong possibility.

The investigation comes amid heightened tension in Poland following a series of suspected Russian-directed sabotage attempts across NATO territory.

Recent incidents linked to Russian intelligence activity include arson plots and attempted attacks on Polish infrastructure. Polish authorities have arrested multiple individuals accused of attempting to set fires or damage railway systems used for transporting Western military equipment to Ukraine.

In June, investigators examined whether a major bridge fire near Warsaw was caused by arson linked to foreign actors after intelligence indicated Russian services may have sought to disrupt key transport arteries.

Security agencies in the Czech Republic, Germany, the Baltic states, and the UK have also warned of increased Russian “gray-zone” activity targeting infrastructure, logistics, and defense supply chains.

Poland, as a key transit hub for Western military aid to Ukraine, is considered especially vulnerable.