If it appears from the affidavit of the complainant or of any other witness that he produces what persons are the proprietors of or the occupants of the house, part of a house or room hereinabove described, the warrant shall order the arrest of such persons by name, but if such proprietors or occupants are unknown, it may be so stated in the affidavits and warrants, and, upon bringing the said persons who are arrested under said warrant before the court, a supplemental affidavit may be made against them by the complainant or any officer executing the warrant charging them with the offense or felony of which they appear to be guilty under the provisions of this division.