law: 1[12. Power to arrest without warrant.
  Any member of the Force may, without an order from a Magistrate and without a warrant, arrest
  (i) any person who voluntarily causes hurt to, or attempts voluntarily to cause hurt to, or wrongfully restrains or attempts wrongfully to restrain, or assaults, threatens to assault, or uses, or threatens or attempts to use, criminal force to him or any other member of the Force in the execution of his duty as such member, or with intent to prevent or to deter him from discharging his duty as such member, or in consequence of anything done or attempted to be done by him in the lawful discharge of his duty as such member; or
  (ii) any person who has been concerned in, or against whom a reasonable suspicion exists of his having been concerned in, or who is found taking precautions to conceal his presence under circumstances which afford reason to believe that he is taking such precautions with a view to committing a cognizable offence which relates to 2[railway property, passenger area and passengers]; or
  (iii) any person found taking precautions to conceal his presence within the railway limits under circumstances which afford reason to believe that he is taking such precautions with a view to committing theft of, or damage to, 2[railway property, passenger area and passengers]; or
  (iv) any person who commits or attempts to commit a cognizable offence which involves or which is likely to involve imminent danger to the life of any person engaged in carrying on any work relating to 2[railway property, passenger area and passengers].]