Ukraine has accused Russia of deploying missiles made by MMZ Avangard against ground targets since Russia launched what it terms its "special operation" on Feb. 24. "Extreme equipment is used on Russian warships," the complaint said, "in communications systems." "It was necessary to use a cover because the Russian company is blacklisted in the U.S.," one of the people familiar with the shipments said. The executive said he had never heard of Extreme or of DEMZ buying Extreme equipment for itself or on behalf of others. Like MMZ Avangard, United Shipbuilding has been listed as a "blocked" entity by the U.S. Treasury since July 2014.

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