Patriarch Kirill, representing the World Council of Churches in the 1960s, is said to have looked after the interests of the USSR.
The SonntagsZeitung newspaper cites declassified archives that show Cyril was involved in espionage in Geneva. He worked secretly for the KGB.
It is reported that his code name was Mikhailov.
The Russian Orthodox Church did not want to comment on this information about Kirill’s past, and the Russian Embassy in Switzerland called the article “an example of Russophobia.”
Last year, Lithuania banned Moscow Orthodox Patriarch Kirill from entering the country because of his support for Russia, which continues its invasion of Ukraine.