Hold hostage

Mr. President, when someone holds up this bill and holds it hostage, it is holding hostage the money that would go to aid victims of disaster.

Plans for the resumption of her nursery school were put on hold, held hostage by the polio epidemic.

Before Frank could turn in his final exam, Jigsaw held his computer hostage.

That way, a taxidriver cannot hold the traveler's luggage hostage in the trunk for more money.