Estonia's state district attorney said China has not reacted to a sixmonthold demand for assistance with an investigation into a Chinese ship which Estonia suspects cut two of its subsea telecoms cable televisions.

The two cables linking Estonia to Finland and Sweden were damaged on Oct 7-8, and an Estonia-Finland gas pipeline was broken the exact same night, harming energy security and raising alarm bells in the larger area.

Both Estonia, which is examining the cable televisions damage, and Finland, which is checking out the Balticconnector gas pipeline, have named the Hong Kong-registered container ship NewNew Polar Bear as the prime suspect.

The Chinese authorities have not offered a response on carrying out the legal help request since yet, Estonian state prosecutor Triinu Olev said in a composed statement on Tuesday.

We require to collect extra evidence to determine whether the damage was caused deliberately or by accident. We submitted a legal help demand to the Chinese authorities to collect evidence from the vessel and its team, she included.

There was no immediate reply from the Chinese embassy to a. Reuters email looking for comment on Olev's remarks.

Estonia believes the vessel belongs to a Chinese company,. Olev stated.

The demand was sent out on November 10, her representative informed. Reuters in December. A different legal support demand was. sent out to China by the Finnish investigation, he stated.

Reuters has actually reported that the vessel existed at all. three sites around the time of their damage, on its way to a. port near St Petersburg, Russia, according to information from. MarineTraffic, a ship-tracking and maritime analytics provider.

A large anchor, thought to come from the Chinese vessel,. was discovered near the pipeline, and the detectives stated the pipeline. and the telecoms cables were likely broken as the anchor was. dragged across the sea bed.

Finland's National Bureau of Examination informed Reuters last. month it has actually worked together with Chinese authorities in fixing. the damage to the pipeline, including, there is progress in the. investigation.

China said in October it wanted to supply the gas. pipeline investigation the necessary details in accordance. with global law. Russia has actually dismissed as rubbish the. idea that it was involved.

NewNew Polar Bear has been anchored in China's Tianjin port. considering that returning from Russia in December, according to. MarineTraffic data.

NATO stepped up its patrols in the Baltic Sea last year. after the events, and the Norwegian Navy watched the NewNew. Polar Bear as it sailed over the nation's essential gas pipelines.