Opponents of a Pittsburgh gun ordinance suffered another loss Tuesday when the state Supreme Court denied their petition for appeal of a lower court ruling that found they had no standing to challenge the ordinance.

The National Rifle Association and four Pittsburgh gun owners sued the city over an ordinance that requires gun owners to report any lost or stolen gun to the city within 24 hours of the discovery of the loss. Allegheny County Common Pleas Court Judge R. Stanton Wettick Jr. had thrown out their suit for a lack of standing and a split Commonwealth Court panel upheld that decision last year.