Rapid City police say they have busted a major local drug trafficking and money counterfeiting operation. Four people have been arrested on drug charges, with charges related to the alleged counterfeiting operation pending.

The investigation began with the search of vehicle that was pulled over early Monday and ended with the searches of two homes, a motel room and a tattoo parlor.

Authorities say they found traces of cocaine during the search of the vehicle, which led to search warrants that led to more search warrants.

Officers confiscated $56,000 in cash, more than a dozen rifles and handguns, counterfeit money and the equipment used to make it, and illegal drugs including methamphetamine, cocaine and marijuana.