Among those locked up was Alexei "The Tractor" Petrov, a former Bulgarian commando and secret agent, who served as adviser to the former head of the State National Security Agency (DANS) until last year.
Među pritvorenima su Alexei "Traktor" Petrov, bivši pripadnik bugarskih posebnih postrojba i tajni agent, koji je bio savjetnik bivšem šefu Državne agencije za nacionalnu sigurnost (DANS) do prošle godine.