Bulgarias dossier opening committee said that 15 members of the Supreme Judicial Council (SJC) co-operated somehow with the former State Security intelligence service.
According to the committees report, four of the magistrates were agents and the others worked for the services in some manner.
The committee was set up to open formerly classified files and find out whether any state officials or public figures were former agents.
National Assembly already published the results of the investigation on its website.
Head of the dossier opening committee Evtim Kostadinov told Bulgarian National Radio that work on the past of officials in major national offices is ongoing.
The committee will also try to investigate the past of all candidates to run in Bulgarias upcoming municipal elections. Though the amount of work was significant, the committee would try to complete the investigation by the autumn, Kostadinov said.
