Polish Prime Minister Donald Tusk has threatened harsh consequences following the arrest of Polish citizens suspected of collaborating with Russian intelligence services. He wrote on the short messaging service X, formerly Twitter, on Friday: “There will be no leniency for collaborators with the Russian secret services. We will burn out every betrayal and every attempt at destabilization with a red-hot iron.” Commenting on the current status of the investigation into two specific conspiracies, he said that a Pole responsible for a thwarted assassination attempt on Ukrainian President Volodymyr…