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 February 21 in a letter sent to the UN Security Council. The Security Council is meeting later in the day 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 that the pipelines carrying natural gas from Russia to Germany were blown up deliberately.