Undersea cable damaged between Latvia and Sweden

NATO and Baltic states are investigating suspected external damage to a fibre optic cable between Latvia and Sweden, prompting enhanced infrastructure protection efforts in the Baltic Sea.
Submainre cables carrying Internet traffic

A fibre optic cable running under the Baltic Sea between Latvia and Sweden sustained significant damage, likely due to external factors, according to Latvian authorities. The incident prompted NATO to deploy patrol ships and launch a coordinated investigation with Sweden, where the Security Service seized control of a vessel as part of its probe. Latvian Prime Minister Evika Silina confirmed that her government is collaborating with NATO and neighboring Baltic Sea countries to determine the cause.

Senior prosecutor Mats Ljungqvist stated that investigators are conducting several actions but refrained from disclosing details due to the ongoing preliminary inquiry.

NATO’s recently launched ‘Baltic Sentry’ mission, involving naval and aerial assets, aims to safeguard critical infrastructure in the region following a series of incidents affecting cables, pipelines, and telecom links since Russia’s invasion of Ukraine in 2022. The project also includes the deployment of new technologies, including a small fleet of naval drones. Swedish Prime Minister Ulf Kristersson also emphasized close cooperation with NATO and Latvia in response to the situation.

The damaged cable, located in Sweden’s exclusive economic zone, connects Latvia’s Ventspils to Sweden’s Gotland island. The Latvian State Radio and Television Centre (LVRTC), which operates the cable, reported switching communications to alternative routes and is contracting a repair vessel. Repairs are expected to proceed more quickly than those for gas pipelines or power cables, as fibre optic cables in the Baltic Sea are typically restored within weeks.

This incident follows last month’s damage to the Finnish-Estonian Estlink 2 power line and telecom cables, reportedly caused by a Russian tanker dragging its anchor. Finnish and Swedish leaders underscored the importance of bolstering the protection of critical undersea infrastructure in the Baltic Sea. NATO also stated it reserves the right to act against ships deemed security risks while continuing to monitor the situation closely.