NEW YORK, July 14 (Reuters) - An alleged Russian intelligence officer pleaded not guilty on Friday to U.S. charges of smuggling U.S.-origin electronics and ammunition to Russia to help its war against Ukraine. Vadim Konoschenok, who was extradited on Thursday from Estonia, entered the plea at a hearing in federal court in Brooklyn. U.S. Magistrate Judge Ramon Reyes ordered Konoschenok detained pending trial, after prosecutors called him a flight risk. Konoschenok was initially charged last September, as U.S. authorities sought to ramp up enforcement of export controls and sanctions designed to hamper Moscow's war effort. Reporting by Luc Cohen; editing by John Stonestreet and Sandra MalerOur Standards: The Thomson Reuters Trust Principles.

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Persons: Vadim Konoschenok, Judge Ramon Reyes, Konoschenok, Sabrina Shroff, Luc Cohen, John Stonestreet, Sandra Maler Organizations: YORK, Ukraine, U.S, Attorney, Thomson Locations: Russian, Russia, Estonia, Brooklyn . U.S, Brooklyn, U.S, Washington