Section 109

A police officer knowing of a design to commit any seizable 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 cannot otherwise be prevented.

Prevention of injury to public property 110.

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.