Swedish and Finnish police are investigating a suspected case of sabotage of an undersea telecoms cable in the Baltic Sea, and Sweden's coast guard has deployed a vessel to the area where multiple seabed cables have been damaged in recent months.

Government offices, schools and workplaces fell silent in Sweden at midday on Tuesday in remembrance of the victims of a mass shooting at an adult education centre last week when a gunman killed 10 people before turning his weapon on himself.