Spanish police say narcotics investigators have found $6.3 million in cash buried in a shanty town on the island of Mallorca.

The National Police say authorities trying to break up a drug ring used heavy construction equipment to rip up the concrete floor of a shack in the city of Palma and found seven boxes with the euros, plus 17 pounds of jewelry and gems and $8,000.

A police statement issued Tuesday said one of the boxes was buried under a dog house in a patio of the home.

The money and other valuables were unearthed during a series of raids that began Sept. 18 in a shanty town called Son Banya.

Police also seized undisclosed amounts of heroin, cocaine and marijuana.