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10. Chapter XI of the Code deals with the preventive action of the Police. Section 149 coming in the realm of that Chapter, under which every Police Officer may interpose for the purpose of preventing, and shall to do the best of his ability, prevent the commission of any cognizable offence. Under Section 150, every Police Officer receiving information of a design to commit cognizable offences shall communicate such information to the Police Officer to whom he is subordinate and to any other officer whose duty it is to prevent or take cognizance of the commission of such offence. Under Section 151, which is relevant for the present purposes, a Police Officer knowing of a design to commit any cognizable offence may arrest, without orders from a Magistrate and without a warrant, the person so designing, if it appears to such officer that the commission of the offence be otherwise prevented. Similarly, under Section 152, a Police Officer may of his own authority interpose to prevent any injury attempted to be committed in his view to any public property, movable or immovable, or the removal or injury of any public landmark or buoy or other mark used for navigation.