The scope of the search may be only such as is authorized by the warrant and is reasonably necessary to discover the items specified therein. Upon discovery of the items specified, the officer must take possession or custody of them. If in the course of the search the officer inadvertently discovers items not specified in the warrant which are subject to seizure under N.C. Gen. Stat. § 15A-242, he may also take possession of the items so discovered. (1973, c. 1286, s. 1.)