WASHINGTON — Two American citizens and five Russian nationals were charged in an indictment unsealed Tuesday with operating a sophisticated international smuggling network that obtained sensitive U.S. military technology and ammunition on behalf of the Kremlin, the Department of Justice said.Further sanctions were imposed on Russia by the Biden administration following its invasion of Ukraine in February."With three of the defendants now in custody, we have disrupted the procurement network allegedly used by the defendants and Russian intelligence services to smuggle sniper rifle ammunition and sensitive electronic components into Russia," said Attorney General Merrick Garland.The network allegedly operated as recently as late November, when the Justice Department says Konoshchenok was stopped on the Estonian-Russian border with "approximately 20 cases containing thousands of U.S.-origin bullets, including tactical rounds and .338 military sniper rounds."A letter from prosecutors Tuesday requesting bail standards for the two U.S. based defendants emphasized the gravity of the crimes alleged."