Russia and European nations have launched investigations into the cause of the gas leaks in the Nord Stream pipelines in the Baltic Sea, while countries in the region beef up security around their energy facilities.

Gas leaks were detected in the Nord Stream 1 and Nord Stream 2 pipelines near the Danish island of Bornholm on Monday. Seismic reports showed that "in all likelihood" there had been explosions in the area prior to the leaks.

While some politicians and media pointed fingers at Russia and the United States, both countries have denied that they were responsible for the suspected sabotage.

At the request of Russia, the United Nations Security Council will meet on Friday to discuss the incident.

Kremlin spokesman Dmitry Peskov said on Wednesday that the incident needed to be investigated but the timing for repair was still unclear.

Peskov said the claims that Russia was somehow behind a possible attack on the pipelines were stupid, adding that the US had opposed the Nord Stream pipelines and US companies had reaped huge profits supplying gas to Europe.

"That's quite predictable and also predictably stupid," he said when asked if Russia might be behind the possible sabotage.