No punishment has yet been delivered for crimes committed under Communist rule, Bulgarian President Rosen Plevneliev said on Saturday.
Plevneliev attended a ceremony held in memory of victims of the totalitarian regime that held the country in a tight grip between the late 1940s and 1989.
"It is time we shake the dust off history to find the truth," he is heard saying in a report aired by the Bulgarian National Television.
The ceremony was held on the Danubian island of Persin, where the Belene camp (the island itself is also known as Belene) was used between 1949 and 1989 (having been defunct in brief periods) to imprison political opponents to the Bulgarian Communist Party, but also internal opposition.