A gun-rights advocate says he and others may show up next week at the St. Louis Zoo with firearms or empty holsters to challenge the site's ban of weapons.

Fifty-six-year-old Jeffry Smith of Cincinnati tells the St. Louis Post-Dispatch that while Missouri law bars guns in gated areas of amusement parks, he questions whether the zoo fits that description as a public, taxpayer-supported place.

A spokeswoman for the zoo, Susan Gallagher, says that site's prohibition of all weapons within its gates relies on numerous state statutes.

Smith last October led a St. Louis march to press their right to carry guns openly in public.