Two gun-rights groups are suing to force Nebraska to change a state law that bars legal immigrants from obtaining permits to carry concealed weapons.

The Second Amendment Foundation and the Nebraska Firearms Owners Association have sued Nebraska officials on behalf of Carlos Nino De Rivera Lajous, a 68-year-old Mexican man who has been legally living in Lincoln since 1990. The lawsuit says the state’s denial of a concealed-carry permit to Lajous violates federal constitutional rights to equal protection and to bear arms.

The lawsuit, filed Monday in Lincoln’s federal court, is seeking an injunction to keep the part of the law requiring U.S. citizenship for a concealed-carry permit from being enforced.

On Saturday, a federal judge in New Mexico issued a temporary injunction to stop a similar practice there.