Section 156(d) in Police Regulations, Bengal , 1943
(d)copies of the concise report shall be sent by express telegram and of the detailed account by the quickest possible means other than a telegram -(i)by the Magistrate, if one is present, to the District Magistrate, Superintendent, Commissioner and Chief Secretary, and(ii)by the police officer in command to the District Magistrate, Superintendent, Deputy Inspector-General and Inspector-General.