Finnish police investigating last year's damage to two telecommunication cables in the Baltic Sea connecting Finland and Estonia said on Friday that their criminal investigation into the damage was concluded.

The apparent sabotage on December 31 was one of several cases affected undersea infrastructure in the Baltic since Russia's 2022 invasion of Ukraine.

Soon after, Finland seized the Fitburg cargo ship — flying the flag of the Caribbean state of Saint Vincent and the Grenadines — while it was en route from Russia to Israel, suspecting it of involvement in the damage to cables linking Helsinki and Tallinn.

Two people were arrested soon after.What did police say about the investigation?

"The ⁠investigation ​concluded with four suspects, ​three of whom remain subject to a travel ban," ​police said ‌in a statement.