A Customs and Border Protection official shows photos of seized guns in Nogales, Arizona, in February. (Joel Angel Juarez/For The Washington Post)

By Ann E. Marimow

The Supreme Court on Thursday unanimously blocked the Mexican government from proceeding with an unusual lawsuit that sought to hold major U.S. firearms manufacturers accountable for gun violence in that country. Subscribe for unlimited access to The Post You can cancel anytime. Subscribe

The justices reversed an appeals court ruling, saying gunmakers are generally protected from liability and that Mexico had failed to show that U.S. companies intentionally participated in illegal sales to drug cartels.

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