The operation of the specialized prosecution took place Friday in the Northern town of Levsky and was aimed at capturing a gang over alleged phone frauds.
Seven of the eight detainees were arrested in Levsky while one of them - in Sofia.
Specialized prosecution is expected to decide Saturday how many of them will be charged with criminal activity.
A dozen of accomodations were searched in the town Friday morning. Police confiscated a great number of cellular phones, much money and at least 1 kg of gold ornaments.
All of the detainees have criminal dosiers and most of them have been convicted.
The group was involved in telephone deceits all over the country. It is the second gang to be crushed down after a similar one in the town of Gorna Orjahovitsa, investigators say.
Deputy prosecutor-in-chief Ivan Geshev expressed optimism and declared prosecutors' ambition that in 6-8 months that kind of criminal activity would be significantly diminished.
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