Officials of Bulgaria's Supreme Judicial Council have worked for the country's former secret services in the past, the head of the secret files committee Evtim Kostadinov said Thursday for the national radio.
The names of the secret services collaborators will be announced later in the day, he added.
The secret files committee deals with the disclosure of Bulgaria's communist-era intelligence services files.
The files of the former Committee for State Security are a thorny issue in Bulgaria, especially when it comes to the past of high-ranking officials.
Bulgaria's communist-era security service is believed to have remained potent after the fall of communism with the ex-operatives closely linked to the political and business establishment.