When a Coroner {Subs. by Act 10 of 1881, s.5, for "is informed"} [has reason to believe] that the death of any person has been caused by accident, homicide, suicide, or suddenly by means unknown, or that any person being a prisoner has died in prison,
and that the body is lying within the place for which the Coroner is so appointed,
the Coroner shall inquire into the cause of death.
Every such inquiry shall be deemed a judicial proceeding within the meaning of section 193 of the Indian Penal Code (45 of 1860).