Elisa’s data cable between Helsinki and Tallinn was damaged on Wednesday, according to the Finnish telecom firm.

According to a police statement, the Border Guard located a vessel suspected of causing the damage. Finnish authorities took control of the ship as part of a joint operation.

The suspected vessel was intercepted by the Border Guard patrol ship Turva and a helicopter in Finland’s exclusive economic zone, while the cable damage reported by Elisa is located in Estonia’s economic zone.

The police have consulted the National Prosecutor’s Office, which has issued a prosecution order.

Police are investigating the incident as aggravated criminal damage, attempted aggravated criminal damage and aggravated interference with telecommunications.

Last Christmas, an oil tanker called Eagle S dragged its anchor along the seabed, damaging several undersea cables between Finland and Estonia. The captain of the vessel claimed the incident was accidental.

Following a trial this past autumn, Helsinki District Court said it lacked jurisdiction in the case.

At 1:00pm on Wednesday, Finnish President Alexander Stubb said in a post on social site X that the country "is prepared for security challenges of various kinds, and we respond to them as necessary.