Suspected sabotage of German minehunter (Rostock)

German Navy personnel discovered that several cable harnesses (Kabelbäume) on a Frankenthal-class minehunter (Minenjagdboot, Type 332) had been deliberately severed while the vessel was undergoing scheduled maintenance at the Tamsen-Maritim shipyard on the Warnow river in Rostock. The cut bundles were located behind external hatches of the warship, making the damage difficult to spot. The manipulation was found during the yard stay in late 2024 and became public in mid-February 2025. Reporting on the precise vessel has been inconsistent: regional outlet Die Rheinpfalz and specialist publication marineforum identified the boat as the minehunter Homburg (M 1069), while other accounts have named the Weilheim; most contemporaneous national reporting, including Der Spiegel, did not name the ship.

Experts ruled out an attempted cable theft, which led investigators to treat the damage as a deliberate act. The Staatsanwaltschaft Rostock (Rostock public prosecutor's office) opened an investigation into suspected sabotage against defense equipment, but a spokesperson declined to give details, citing the ongoing inquiry and the security-sensitive nature of the case. According to specialist reporting, informed circles believed a bolt cutter was used; no suspects were identified and no group or state was officially blamed.

The case was reported as one of several suspected sabotage incidents affecting the German Navy around the turn of 2024–2025. Other reported cases included dozens of kilograms of metal shavings dumped into the propulsion system of the new corvette Emden, and an attempt to introduce waste oil into the drinking-water system of the frigate Hessen. The Inspector of the Navy, Vice Admiral Jan Christian Kaack, publicly acknowledged that multiple Navy units had been affected by suspected sabotage and that countermeasures were being taken at shipyards.

The deliberate severing of concealed cable harnesses, with theft excluded by experts, points to intentional sabotage rather than crime or wear. Attribution remains open: no suspects were named and German authorities did not officially blame any state, though Western security circles have suspected Russian-directed activity using recruited 'disposable agents' amid a wider pattern of hybrid attacks on German naval assets. The Rostock prosecutor disclosed little, and several related Navy sabotage probes were later discontinued for lack of conclusive evidence. The incident is best read as an unresolved, suspected act of sabotage within a broader, still-unattributed campaign.