Sweden has sent a formal request to China to cooperate with an investigation into suspected sabotage over the sudden disruption of two submarine internet cables in the Baltic Sea earlier this month, after tracking data linked a Chinese ship to the incidents.

Sweden's prime minister says his government has formally asked China to cooperate in explaining the recent rupture of data cables on the Baltic Sea bed in an area where a China-flagged vessel was sighted.

The Lithuanian unit of the Swedish telecommunications company Telia Lietuva has repaired the communication cable between Lithuania and Sweden in the Baltic Sea. The cable was damaged about two weeks ago,

Sweden has asked China to assist in investigating the damage to two Baltic Sea data cables near a Chinese vessel.

Another cable at the bottom of the Baltic, between Sweden and Lithuania, was broken a day before Cinia's cable was damaged. It was repaired on Thursday evening, according to Arelion, the Swedish firm that manages the cable. That cable is now operating at full capacity, Arelion told news service STT.

Sweden is asking a Chinese vessel to return to Swedish waters to help facilitate an investigation into recent breaches of undersea fibre-optic cables in the Baltic Sea, Prime Minister Ulf Kristersson said on Tuesday,

The Russian and Chinese governments have both denied any involvement with the incident, though sources claim the damage is consistent with an intentional act of sabotage.

Western officials believe Moscow most likely orchestrated the Baltic Sea incident as part of growing efforts to cripple key maritime infrastructure.

European investigators believe a Chinese-owned commercial ship deliberately dragged its anchor to sabotage the two undersea telecommunications cables cut in the Baltic Sea earlier this month. However,

Sweden has demanded that the Chinese vessel connected to an investigation of two Internet cables in the Baltic Sea being damaged earlier this month return to its waters as part of the probe.