A Special Punitive Group was established as part of the Central Committee of the BCP, including Yako Dorosiev, Captain Ivan Minkov and Vulko (or Valko) Chervenkov. The Military Organization (MO) of the BCP, led by Minkov and Major Kosta Yankov, set up small isolated groups ("шесторки", "shestorki") that carried out individual attacks. This, however, did not prevent the police from discovering and destroying the illegal structures of the BCP with relative ease.[citation needed]