Police already detained suspects for the shooting that took place in the coastal city of Varna on April 5.
Plamen Stoyanov was shot at on the night of April 5. The shooting occurred in front of the residential building where Stoyanov lives.
Police said that the detained suspects are questioned.
Stoyanov works in a private company and has a personal bodyguard. He is a former policeman who was dismissed in 1999 because of connections to organised criminal groups in Varna.
Police previously investigated Stoyanov for the illegal possession of weapons.
