, with sureties to be approved by such customs officer, conditioned that in case of condemnation of the articles so claimed the obligor shall pay all the costs and expenses of the proceedings to obtain such condemnation, such customs officer shall transmit such claim and bond, with a duplicate list and description of the articles seized, to the United States attorney for the district in which seizure was made, who shall proceed to a condemnation of the merchandise or other property in the manner prescribed by law.