LONDON, October 14, 2026 — A cyber incident has reportedly disrupted construction of the Fehmarn Belt tunnel connecting Denmark and Germany, after a contractor’s central computer systems were taken offline, Danish media reported Tuesday.
Femern Link Contractors (FLC), the main company responsible for building the tunnel, notified Sund & Baelt, Denmark’s state-owned infrastructure firm, about the incident.
Sund & Baelt press director Jens Villemoes confirmed that the company was communicating with FLC regarding the situation. However, he said no additional details were available at the time.
According to Danish newspaper Lolland-Falsters Folketidende, the incident disabled central systems and significantly disrupted work on the multibillion-kroner infrastructure project.
Authorities have not disclosed which systems were affected, how extensive the disruption has been, or who may have been responsible for the incident.
The Fehmarn Belt tunnel is a major European infrastructure project being constructed beneath the Baltic Sea. It is designed to connect Rødbyhavn in southern Denmark with Puttgarden in northern Germany.
Once completed, the tunnel is expected to reduce travel between the two countries to approximately seven minutes by train and 10 minutes by car.
Construction began on the Danish side in 2020, followed by work on the German side in 2021.
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