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Cyberattack Disrupts Construction of Denmark-Germany Tunnel

Oct 13, 2026
Cyberattack Disrupts Construction of Denmark-Germany Tunnel

Construction of a road-and-rail tunnel under the Fehmarn Belt strait, designed to connect Denmark and Germany, has been halted due to a cyberattack. This incident impacted the international FLC consortium responsible for the project, as reported by RMF24.

The cyberattack caused workers' identification cards to stop functioning, leading to the immobilization of vessels, cranes, and platforms essential for offshore work. Consequently, construction activities have been completely suspended, according to Danish media reports.

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The FLC consortium employs approximately 2,800 individuals from various countries, including Denmark, Germany, France, Belgium, the Netherlands, and a significant number of Polish workers at the site.

Representatives from the investor company Sund & Baelt have confirmed that discussions are ongoing with the contractor regarding the situation. However, it remains unclear who is behind the cyberattack or how long it will take to resolve the issues caused by it.

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Henning Mortensen, head of the Danish Council for Digital Security, suggested that there might be a connection between this incident and hybrid warfare. Recent warnings from Danish authorities about potential cyberattacks from Russia have raised the threat level to high.

The tunnel project, which spans 18 kilometers, involves the construction of 89 concrete elements that are transported and assembled at sea using digital software. The estimated cost of the project is around €7 billion, with an initial opening date set for 2029. However, delays had already been anticipated prior to this incident.

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