Nord Stream investigations by Denmark, Sweden and Germany are ongoing

Investigations into explosions that damaged the Nord Stream gas pipelines last year are ongoing and it remains unclear when they will conclude, the Danish, Swedish and German foreign ministries said on Tuesday in a letter sent to the UN Security Council.

“These investigations have not yet been concluded. At this point, it is not possible to say when they will be concluded,” the letter said.

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The UN Security Council is meeting on Tuesday to discuss “sabotage” after Moscow asked for an independent inquiry into the September attacks on the pipelines that spewed gas into the Baltic Sea.

Sweden and Denmark, in whose exclusive economic zones the explosions occurred, have concluded the pipelines carrying natural gas from Russia to Germany were blown up deliberately, but have not said who might be responsible.

The letter said Russian authorities had been informed about the investigations and reiterated that the damage was a deliberate act of sabotage.

In Germany, the federal prosecutor has launched a criminal investigation to establish if a crime of sabotage under section 88 of the criminal code was committed, the letter said.

Read more: Russia says US should prove it did not destroy Nord Stream: Reports