Zhan Videnov was the only prime minister who collaborated with the former communist secret services before the fall of the regime in 1990.

Videnov's alias was Dunav (Danube). He held a secret meeting room in Plovdiv between the years 1988 and 1990. Videnov served as a prime minister in 1996-1997 as leader of Bulgarian Socialist Party.

Videnov's name was among 107 names published by the commission for declassification of the archives of the communist-era secret services on February 13. The commission checked the names of all prime ministers, cabinet ministers and deputy ministers who have served since 1990.

The list puts to an end speculations that former prime minister Simeon Saxe-Coburg was  an agent of the State Security services.

Among the other interesting names on the list are Feim Chaushev, current Deputy Foreign Affairs Minister from the quota of Movement for Rights and Freedoms (MRF). Chaushev was an agent for two years (1966-68) under the name Bisser. The Foreign Ministry has been the work place of most of the State Security collaborates. In total three former foreign ministers are on the commission's list: Lyuben Gotzev, Stanislav Daskalov and Stoyan Stalev. While the list includes 13 former and current deputy foreign ministers.

Current Sofia deputy mayor of finance Minko Gerdjikov is also on the list. He was an official employee of the former State Security. Gerdjikov was deputy minister of commerce in Stefan Sofianski's caretaker government in 1997.

Hristo Droumev, who is currently head of National Place of Culture (NDK), is also on the list. Droumev had two aliases: Draganov and Boril. He served as an agent after applying for the job between 1959-1990, the commission said.  After 1990 Droumev was deputy minister of culture.