Agents from Russias Federal Security Service (FSB) raided a Jehovahs Witnesses office in the occupied Ukrainian city of Mariupol, state mediareported Monday.The FSB and military counterintelligence have uncovered a location in Mariupol that was used by the Jehovahs Witnesses to promote extremist ideology, Zvezda, the Russian Defense Ministrys broadcaster,reported.In 2017, Russias top court branded the Jehovahs Witness movement an extremist organization and members of the religious group have faced prosecution from the authorities.The port city of Mariupol was captured by Russian forces in the spring of 2022 and has been under Moscow's control ever since.Last year, the FSB established a local branch in the occupied region of Donestk, where Maripol is located.Video shared by Zvezdas channel on the Telegram messaging app showed uniformed officers confiscating stacks of books from an undisclosed building.Will There Be Peace Without War? reads one of the booklets in the video.The FSB said more than 20,000 copies of extremist literature were confiscated during the raid.Russias state-run news agency RIA Novostireported that documents were also found showing that the extremist organization Jehovahs Witnesses, which is banned in Russia, is involved in the financing of Ukrainian militants.An investigation was underway to identify those involved in the financing of Ukrainian neo-Nazis, RIA Novosti added.The Jehovahs Witnesses is a U.S.-based Christian evangelical movement set up in the late 19th century that advocates non-violence.