A Polish government official said on Wednesday that Russia was behind a hacking attack that blocked users' access to the online tax filing system, amid persistent high tensions between Warsaw and Moscow over the war in Ukraine.
Western officials say the Russian government is a global leader in hacking and uses cyber-espionage against foreign governments. Moscow has consistently denied that it carries out hacking operations.
"Russians are responsible for yesterday's attack, it must be made clear. We have information that makes it very likely that this was the adversary," Janusz Cieszynski, an official responsible for digitalisation, told broadcaster Polsat News.
