Sweden has opened a preliminary investigation into suspected aggravated “sabotage” and ordered the detention of a vessel in the Baltic Sea suspected of damaging an underwater fiber optic cable connecting Latvia and the Swedish island of Gotland earlier that day.

Sweden on Sunday said it had seized a ship suspected of having damaged a fiber-optic cable under the Baltic Sea linking the country to Latvia, which sent a warship to investigate the latest apparent act of sabotage.

The Swedish coast guard seized a Bulgarian ship after a fibre-optic cable under the Baltic Sea linking Sweden to Latvia was damaged, its owner said on Monday.