A Polish member of European Parliament suggested the US was responsible.

European officials on Tuesday said massive leaks in the Nord Stream natural gas pipelines that were caused by explosions were likely the result of sabotage, raising questions on who the culprit might be.

The Nord Stream pipelines connect Russia to Germany via the Baltic Sea. Russia recently stopped shipping gas through Nord Stream 1 indefinitely, and the construction of Nord Stream 2 has been completed, but the pipeline has never been fully operational as Berlin suspended the project after Russia invaded Ukraine.

Two leaks were discovered in Nord Stream 1, and one leak was discovered in Nord Stream 2 after the operator reported a sudden drop in pressure overnight Monday. While neither pipeline has been delivering to Europe, both contain gas under pressure.

Two underwater explosions were recorded earlier on Monday near the Danish island of Bornholm in the Baltic Sea, which is where the leaks occurred. Nord Stream AG, the operator of the pipelines, said it was not possible to estimate when the damage could be fixed.

EU, Swedish, Norwegian, and Danish officials all said the damage was likely caused by a deliberate attack. Over in Moscow, Kremlin spokesman Dmitry Peskov said that sabotage could not be ruled out.