Poland's Internal Security Agency rendered ineffective a Russian espionage ring, detaining five Polish citizens and a Russian woman suspected of spying for the Kremlin and illegally supplying materials, ammunition, and weapons to Russia. Elsewhere, Lithuania expelled three Ukrainian citizens accused of carrying out tasks for "hostile" foreign intelligence services in exchange for money. Estonia deported Russian citizen Leonid Karabeshkin and banned him from entering the Schengen Area over his alleged links to Russian secret services. The German polizei arrested a Ukrainian citizen on suspicion of spying for the Kremlin.