German investigators have not yet discovered any evidence that Russia was responsible for destroying gas pipelines Nord Stream 1 and 2 back in September.

So says German Attorney General Peter Frank in an interview with German media Die Welt as cited by news agency dpa. 

”It cannot be proven at this time. The investigation continues.”

Using two vessels, Germany has collected water and soil samples as well as debris from the pipelines. The explosion site has also been thoroughly investigated, notes dpa.

”We are currently conducting a forensic investigation,” says Frank.

The explosions caused a total of four leaks on vital gas conduits Nord Stream 1 and 2 connecting Russia and Germany.

The explosions took place near the Danish island of Bornholm on Sep. 26 of last year in Denmark’s exclusive economic zone.

Danish and Swedish investigations have demonstrated evidence of deliberate sabotage, but without pointing specifically at any potential culprit.

Back in December, US media The Washington Post cited statements and assessments from diplomats and intelligence sources as saying that there was no clear evidence that Russia was responsible for the attacks.

Several Western governments and analysts had originally claimed so in the wake of the explosions.

According to The Washington Post, some sources have said that it might never be possible to determine the perpetrators of the sabotage.

Nord Stream 1 and 2 had an annual combined capacity of 110 billion standard cubic meters - slightly more than half of Russia’s gas exports prior to the war in Ukraine.