By Maria Martinez
The Federal Office for the Protection of the Constitution (BfV) said the warning was issued with partners including Germany's foreign intelligence agency, BND, and the U.S. FBI.
APT28, also known as "Fancy Bear", is attributed by Western governments to Russia’s military intelligence service, the GRU.
The group attacked several thousand routers globally, the BfV said, including around 30 vulnerable devices in Germany.
In some cases, compromise was confirmed, prompting operators to replace affected routers.
APT28 previously carried out cyberattacks on Germany’s parliament, the centre-left SPD political party and air traffic control authorities, the BfV said.
(Reporting by Andreas Rinke; Writing by Maria Martinez; Editing by Jamie Freed)

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