"In Russia, there are symptoms of increasing public support for actions against Ukraine," Stanisław Żaryn said in a tweet at the weekend.
"The propaganda led by the Kremlin is paying off," he added.
Russian society "not only supports actions against Ukraine, but it even seems to expect an increasing offensive by the Russian army," Żaryn, who is spokesman for Poland’s security services, also tweeted in English.
"Numerous messages show that the Russians use the language of official propaganda towards Ukrainians," he said.
"For a few years, Russian propaganda has argued that Ukraine is ruled by 'Nazis', and calls the war 'a special operation aimed at fascists and Nazis,'" Żaryn noted.
"This is exactly what some public opinion describes Russia's military actions against Ukraine," he observed.
In the early morning of February 24, Russia announced a "special military operation" against Ukraine to eliminate what Putin said was a "serious threat" against his country.
Despite appeals and warnings from the international community, Moscow launched a full-scale invasion of the country by land, air and sea, the biggest attack by one state against another in Europe since World War II.
Monday is the 61st day of Putin's war on Ukraine.
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Source: IAR, PAP, Reuters