According to a source within the British defense force, theNord Stream 1 and 2 were likely attacked with remotely-detonated explosives.

The source told Sky News that the leak was probably the result of an attack.

The source told the outlet that mines could have been planted by using a long line, dropping them from a boat, or using a drone months before the attack.

On the same day that CNN reported on new information about the leaks, a British source sent a message to Sky News.

Citing two unnamed Western intelligence officials, the outlet reported that European security officials were aware of Russian Navy support ships being spotted near the leaks

According to one of the intelligence officials, Russian submarine were seen near the area.

Natural gas is delivered from Russia to Europe. The natural gas leak in the Baltic Sea has been seen in a military video.

Russia has been accused of carrying out a terrorist attack.

The country's officials believed the leaks were the result of sabotage, according to German news outlets. The German lawmakers pointed the finger at Russia, saying the leaks were meant to threaten Europe.

The Kremlin described the speculation as stupid and predictable.

Analysts said that the explosions at theNord Stream line could signal an increase in hybrid warfare with Russia weaponizing energy to choke off Europe and escalate the continent's energy crisis.

Jake Sullivan, the US's national security adviser, said there was "apparent sabotage" of the key pipes.