make, prior to the institution of libel proceedings under
section 334(a)(2) of this title, seizures of drugs or containers or of equipment, punches, dies, plates, stones, labeling, or other things, if they are, or he has reasonable grounds to believe that they are, subject to seizure and condemnation under such section 334(a)(2). In the event of seizure pursuant to this paragraph (5), libel proceedings under
section 334(a)(2) of this title shall be instituted promptly and the property seized be placed under the jurisdiction of the court.