(1) Any person who commits the offence of robbery shall upon conviction be sentenced to imprisonment for not less than 21 years.
(a) any offender mentioned in subsection (1) of this section is armed with any firearms or any offensive weapon or any obnoxious or chemical materials or is in company with any person so armed; or
(b) at or immediately before or immediately after the time of robbery the said offender wounds any person,
the offender shall upon conviction be sentenced to death.
Section 402. of the Criminal Code Act in Nigeria