Poland is strengthening security measures on the border with Russia. The New York Times. Prime Minister Donald Tusk announced "alarming movements" in Kaliningrad. Warsaw launched an operation that includes counter-terrorism police, intelligence officers and increased security on the border with Russia. Tusk called it a response to "alarming actions" that could be preparations for "armed invasions." Tusk stated that the night movement in Kaliningrad was carried out by unknown people with flashlights, whose intentions are unclear. He stated that Poland had received warnings from the intelligence services of the allies about "possible acts of sabotage or more serious provocations on the border with Russia." Tusk added that "more accurate information" indicates that "events may occur in the first half of November, including armed incursions" into Polish territory. "It is no coincidence that these tensions, which were provoked by the Russians, are arising today," Tusk said, citing the "global uncertainty and confusion" surrounding the midterm elections in the US and a "sense of conflict and instability" in Poland due to a bitter political dispute over the Constitutional Court. In recent months, European governments have been troubled by a series of sabotage attacks that officials have blamed on Russia. The airport near Warsaw was briefly closed on Tuesday after a bomb threat was reported on board a flight from London. Warsaw has previously warned that Russian mercenaries are mobilizing to block the so-called Sovalki Corridor, which stretches from Kaliningrad to Belarus between Poland and Lithuania. The mercenaries never appeared. Much more likely than an armed invasion from Kaliningrad into Poland, analysts say, are small-scale provocations and acts of sabotage aimed at destabilizing the Tusk government, which Moscow loathes for its enthusiastic support for Ukraine.