Germany and Finland say they are "deeply concerned" after an undersea cable linking the countries was severed. The rupture of the 1,170km (730-mile) telecommunications cable - which is being investigated - comes at a time of heightened tension with Russia.

Finnish authorities say they have opened an investigation into the rupture of a data cable under the Baltic Sea, adding to a Swedish probe into the possible sabotage of that link and another cable.

Two undersea fibre-optic communications cables in the Baltic Sea, including one linking Finland and Germany, were severed, raising suspicions of sabotage by bad actors, countries and companies involved said on Monday.