Story highlights An additional $3.1 million is budgeted to use in the search next year, minister says

Madeleine vanished from her family's holiday apartment in 2007

(CNN) The investigation into the disappearance of British girl Madeleine McCann, who vanished nearly a decade ago, has cost $15.7 million and is expected to rise, the UK said Friday.

An additional $3.1 million is budgeted to use in the search next year, according to the Home Office.

Minister Lord Bates disclosed the figure in response to a written parliamentary question. The nearly $16 million price tag accounts for the cost up to June of this year.

Madeleine was a few weeks shy of her fourth birthday when she vanished from her family's holiday apartment on May 3, 2007, in the Portuguese resort town of Praia da Luz

Her parents had left Madeleine and her younger twin siblings asleep while they went for dinner with friends at a nearby tapas restaurant.

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