SIOUX CITY, Iowa (AP) — Two people have sued Sioux City over its ordinance banning pit bulls. The Sioux City Journal reports that the lawsuit was filed Friday in U.S. District Court in Sioux City.

In it, Jennifer Frost and a woman referred to as Jane Doe ask the court to bar the city from enforcing the ordinance.

The lawsuit urges the court to outlaw the ordinance as a violation of the constitutional right to due process.

The lawsuit says the ordinance, passed in 2008, is inconsistent and bans animals that are not harmful. The ban prohibits residents from having dogs that are at least 51 percent pit bull.

City officials declined to comment about the lawsuit.