Danish tax authorities say they have received data leaked from a Panamanian law firm that helped customers open offshore companies to avoid paying taxes, adding they paid nearly six million kroner ($902,500) for it.

Jim Soerensen, an official with the Danish Customs and Tax Administration, says they were able "to review the material before we paid."

In Thursday's statement, Soerensen said they now will "go deeper" to see whether people in the documents should be investigated for tax dodging.

Earlier this month, the Danish authorities said they had received an anonymous offer to acquire data from the so-called "Panama Papers" that could involve up to 600 people. At the time they didn't disclose the price.