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Denmark's intelligence service said Russia has conducted sabotage attacks against Danish defense firms, part of an escalating hybrid warfare campaign, while an FSB sabotage campaign targeting European arms makers was detailed, including a narrowly averted August 2026 drone attack on a Ukrainian Antonov cargo plane at Leipzig airport. Separately, UK officials estimated Russian hostile activity, including cyberattacks and damage to undersea infrastructure, costs Britain up to £2.5 billion annually.