(NEWSER) – Two mothers from Chicago's South Side are suing three nearby suburbs and making an unusual civil-rights argument in the fight against gun violence. Their lawsuit filed July 7 claims the governments of Lyons, Lincolnwood, and Riverdale don't do enough to stop the "flood" of guns into Chicago that perpetuates violence in poor, black neighborhoods, the Washington Post reports.

Pam Bosley and Annette Nance-Holt know of it first-hand: Both lost teenage sons—one was shot while unloading music equipment at a church, the other while shielding a friend on the bus. The mothers, who say their civil rights are being violated, demand employee background checks and better security and training for the suburbs' gun shops.

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