Thirteen individuals have been detained in a police operation in Kumanovo and its surrounding, suspected of serious crimes - drug and arms trafficking, extortion, money laundering etc.
The homes and other facilities belonging to the detainees are being searched.
Interior Ministry Spokesman Ivo Kotevski said Wednesday the gang has committed serious crimes since 2004.
"These are members of a family that owns enormous property in the area of Kumanovo. They have probably involved other individuals in their crimes", said Kotevski.
He added a large portion of their assets had been acquired through heroin distribution in Switzerland.