A 10-year-old Argentine girl was found by Brazilian police seven years after she was kidnapped by her father, the authorities said.

The discovery of the child occurred this March in the western city of Dourados, but was only revealed to the press Saturday after the authorities, having confirmed her identity, handed her over to representatives of the Argentine Embassy.

The Civil Police of Mato Grosso do Sul, a state that borders on Bolivia and Paraguay, said they found the girl thanks to an anonymous informant who said the minor was being mistreated and that her father kept her in a “private jail.”