Civil libertarians have called a police operation in Mount Isa 'illegal' and urged it to be stopped after it was found officers were questioning and photographing unsupervised children.

Operation Tucson involves police officers recording children’s names, addresses, clothing, destination, and at times escorting the children home.

The Queensland Civil Liberties Council will petition the state’s privacy commissioner to review the operation after several politicians suggested the operation be extended to other regional areas.