—(1) Notwithstanding anything to the contrary in any other written law, it shall be lawful for any police officer in order —
to effect the arrest of any person liable to detention under any order made under section 8;
to effect the arrest of any person whom he has, in all the circumstances of the case, reasonable grounds for suspecting to have committed an offence under this Act or under any provision of any written law for the time being specified in the First Schedule;
to overcome forcible resistance offered by any person to such arrest; or
to prevent the escape from arrest or the rescue of any person arrested as aforesaid,
to use such force as, in the circumstances of the case, may be reasonably necessary, which force may extend to the use of lethal weapons.
(2) Every person arrested for any of the offences referred to in subsection (1) shall as soon as possible after his arrest be clearly warned of his liability to be shot at if he endeavours to escape from custody.
(3) The powers conferred upon a police officer by subsection (1) may be exercised by any member of the security forces, and by any person performing the duties of a guard or watchman in a protected place, and by any other person generally authorised in that behalf by the Commissioner of Police.
(4) Nothing in this section shall derogate from the right of private defence contained in sections 96 to 106, inclusive, of the Penal Code.