U.S. and European law enforcement agencies are working together to investigate whether incendiary devices detonated in July at DHL logistics hubs in Germany and the U.K. were part of a larger operation directed by Russian Intelligence services (in particular, the GRU — Russian military intelligence), the highest level of the Russian government or by outside individuals acting in the interests of Russia, a source familiar with the matter said.

Officials are working to determine whether the larger operation was to place similar devices on aircraft servicing the U.S. and U.S. allies. The Wall Street Journal first reported the alleged plot targeting U.S. aircraft.

The 2025 Homeland Threat Assessment published at the end of October said the U.S. continues to be concerned about threats to the aviation and air cargo systems, including the "potential use of the air cargo supply chain to ship concealed dangerous and potentially deadly items."

DHL said in a statement that it was aware "of two recent incidents involving shipments in our network. We are fully cooperating with the relevant authorities to protect our people, our network and our customers' shipments."

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