A group of foreign citizens have been arrested on suspicion of spying for Russia, two Polish government officials have told the BBC.
Radio station RMF FM reported that Polish security services had broken up a spy network working for Russia.
Six people were detained on suspicion of having installed secret cameras to film transport infrastructure used to deliver aid to Ukraine, it reported.
RMF FM said the cell had prepared sabotage plans.
The decades-long spy conflict between Russia and the West has intensified since the Ukraine war.
Poland is one of Ukraine's strongest allies and its security forces have arrested several people on suspicion of spying for Russia since the invasion last February. คาสิโนบาคาร่า