U.S. probing how American electronics wound up in Russian military gear

Federal agents have begun questioning U.S. technology companies on how their computer chips ended up in Russian military equipment recovered in Ukraine.

Commerce Department agents who enforce export controls are conducting the inquiries together with the FBI, paying joint visits to companies to ask about Western chips and components found in Russian radar systems, drones, tanks, ground-control equipment and littoral ships, according to people familiar with the matter, who spoke on the condition of anonymity to discuss sensitive investigations.

“Our goal is to actually try to track that back, all the way back to the U.S. supplier” to determine “how did it find its way into that weapons system,” one Commerce Department official said of the probes.