The suspect, who denies spying, faces up to 10 years in jail, said Stanisław Żaryn, spokesman for Poland’s security services chief.
The man was "instructed by individuals working for the Russian intelligence services" and is suspected of attempting to approach Polish and foreign politicians, including those working in the European Parliament, added Żaryn, as quoted in English on the gov.pl website.
"The suspect’s activities – conducted in Poland, the EU Member States and elsewhere – remained in line with the Russian information warfare activities aimed at weakening the position of Poland within the EU and in the international arena," Żaryn said.
He added that Poland's Internal Security Agency (ABW) searched the man's place of residence and seized a large amount of money and data carriers.
The suspect, named only as "Janusz N," was detained on May 31 and has been remanded in custody for three months.