They have been on high alert after a string of outages of power cables, telecoms links, and gas pipelines that run along the relatively shallow seabed since Russia invaded Ukraine in 2022.
NATO has boosted its presence in the Baltic with frigates, aircraft, and naval drones in recent years.
An official at the military alliance said they remain in contact with Finnish authorities via the NATO shipping centre located at the Allied Maritime Command in Northwood, UK.
The Fitburg was dragging its anchor in the sea and was directed to Finnish territorial waters, the police and Finland’s Border Guard said. The cable belongs to Finnish telecoms group Elisa.