China has provided information and documents to a joint investigation into two severed Baltic Sea undersea cables, and has invited Germany, Sweden, Finland and Denmark to participate in the probe, the foreign ministry said on Monday.

The Chinese vessel linked to last month’s data-cable breakages in the Baltic Sea has set sail after investigations on board and is heading out of the Danish straits.

A Chinese ship linked to the recent severing of two undersea cables and anchored off Denmark's coast since November 19, departed Saturday, Sweden's coast guard said.Ship tracking site Vesselfinder showed the Yi-Peng 3 steaming north out of the strait on Saturday and Sweden's coast guard confirmed that the vessel had lifted anchor.

Swedish police say they will participate as observers as Chinese authorities conduct investigations aboard a China-flagged ship in the Baltic Sea that was seen in an area where two undersea data cables were damaged last month.

A Chinese bulk carrier that is under investigation following a breach of two fibre-optic cables in the Baltic Sea is again moving after sitting still for more than a month in a nearby Danish shipping lane,

The Chinese ship Yi Peng 3, suspected of sabotage in the Baltic Sea, which had been waiting for a month in international waters within Denmark's Kattegat Strait, set off on Saturday to continue its journey to its destination port in Egypt.