Federal suit filed in Washington on behalf of dead and missing Iraqis . Suit : September 16 a ` ` senseless slaying '' and part of a ` ` pattern '' Blackwater has maintained that it has ` ` acted lawfully and appropriately '' Iraqi officials said 17 were killed in Baghdad 's Nusoor district on September 16 .
Federal suit filed in Washington on behalf of slain and injured Iraqis . Suit : September shooting a `` senseless slaying '' and part of a `` pattern '' Blackwater has maintained that it acted `` acted lawfully and appropriately '' Iraqi officials say 17 were killed in Baghdad 's Nusoor Square on September 16 .