12.—(1) This section applies to an offence under this Act other than section 5 or 13 (4).

(2) Any person may arrest without warrant anyone who is or whom he, with reasonable cause, suspects to be in the act of committing an offence to which this section applies.

(3) Where an offence to which this section applies has been committed, any person may arrest without warrant anyone who is or whom he, with reasonable cause, suspects to be guilty of the offence.

(4) Where a member of the Garda Síochána, with reasonable cause, suspects that an offence to which this section applies or an offence under section 13 (4) has been committed, he may arrest without warrant anyone whom he, with reasonable cause, suspects to be guilty of the offence.

(5) A member of the Garda Síochána may arrest without warrant anyone who is or whom he, with reasonable cause, suspects to be about to commit an offence to which this section applies.

(6) For the purpose of arresting a person under any power conferred by this section a member of the Garda Síochána may enter (if need be, by force) and search any place where that person is or where the member, with reasonable cause, suspects him to be.

(7) This section shall apply to an attempt to commit an offence as it applies to the commission of that offence.

(8) This section shall not prejudice any power of arrest conferred by law apart from this section.