Copenhagen, 8 October, (Brussels Morning Newspaper) – Denmark has raised fresh concerns over Russia sabotage operations targeting defence companies supporting Ukraine, highlighting growing security risks across Europe’s military supply chains. Danish intelligence officials have warned that suspected Russian activities increasingly involve businesses supplying equipment and technology to Kyiv, prompting renewed attention to industrial security and the threat of hybrid warfare.
The warnings come as European governments continue supporting Ukraine while confronting suspected hostile activities involving espionage, cyber operations and potential physical disruption.
For Denmark, the central concern is that companies contributing to Ukraine’s military capabilities could become targets of covert operations intended to interfere with European defence assistance.
Danish Intelligence Raises Concerns Over Defence Firms
Denmark’s Security and Intelligence Service, known as PET, has warned that Russian intelligence activities present a serious threat to businesses associated with military support for Ukraine.
The concerns cover three interconnected risks: preparations for physical sabotage, attempts to recruit intermediaries and reconnaissance involving sensitive industrial facilities.
Companies manufacturing defence equipment, supplying military components or providing logistical assistance may face heightened exposure because of their involvement in European defence supply chains.
Danish authorities have stressed the importance of recognising suspicious behaviour and improving cooperation between businesses and security agencies.
The warnings do not establish that every suspected activity resulted in a completed attack.
Russian Recruitment Methods Raise Security Concerns
Danish intelligence has also highlighted the suspected recruitment of civilians through online platforms.
According to PET, Russian intelligence services have sought intermediaries who may be asked to photograph facilities, collect information or participate in disruptive operations.
Such arrangements can complicate investigations because those carrying out individual tasks may have limited knowledge of who organised them.
PET’s assessment indicates that these methods are part of a broader campaign to pressure European countries supporting Ukraine.
Official Statements Highlight Disputed Allegations
Josefine Christensen, a lead analyst at PET, addressed the changing threat at a security conference in Copenhagen on 7 October.
She said Danish intelligence had observed extensive preparations during the spring, followed by a noticeable increase in operations during early summer.
Christensen also suggested that Russia had shifted towards targets more directly connected with Ukraine’s military capabilities after broader disruption failed to discourage NATO support.
The Russian embassy in Copenhagen has previously rejected Danish accusations, arguing that credible evidence had not been presented. Reuters reported that the embassy did not immediately respond to its request for comment on the latest claims.
Previous Incidents Increase European Security Concerns
The latest warnings follow earlier security incidents across northern Europe.
In September 2025, drone sightings disrupted operations at six Danish airports, including Copenhagen Airport. Danish Prime Minister Mette Frederiksen described the disruption as a hybrid attack against Denmark.
However, that characterisation did not establish Russian responsibility for the incidents.
PET has also warned that Russian-linked sabotage elsewhere in Europe has involved suspected arson and vandalism, while noting the difficulties investigators face in attributing covert operations.
European Defence Companies Face Wider Risks
For Brussels and other European capitals, the allegations underline the importance of securing military production and transport networks.
Defence manufacturers, technology suppliers and logistics companies contribute to Ukraine’s ability to maintain military operations.
Disruption to those businesses could potentially delay deliveries or increase security costs.
Nevertheless, Danish authorities have not publicly disclosed a comprehensive list of affected companies or independently verifiable damage assessments.
What Happens Next for Denmark and NATO?
Danish security agencies are expected to continue assessing threats against defence-related businesses and cooperating with European partners.
Companies involved in military supply chains face continuing pressure to strengthen physical security, monitor suspicious approaches and protect sensitive information.
No new NATO military response or specific Danish prosecution deadline has been confirmed in connection with the 7 October announcement.
The latest Russia sabotage accusations therefore remain an important security concern for European governments as they seek to maintain support for Ukraine while protecting their domestic defence industries.
