Oil income is the linchpin of Russia's economy, allowing President Vladimir Putin to pour money into the armed forces while avoiding worsening inflation for everyday people and a currency collapse.
In September 2022, several unexplained underwater explosions ruptured the Nord Stream 1 and newly-built Nord Stream 2 pipelines that link Russia and Germany across the Baltic Sea.
Knowing who was responsible for the pipelines’ disruption is key to preventing future attacks against essential undersea lines of communication and transport
Washington alleged that the bombings were the work of Moscow. Moscow pointed its finger at Britain and the United States. Germany, Denmark and Sweden set up a joint investigation, but refused to allow Russia to participate. Some sections say pro-Ukranian groups did it.
Undersea explosions late last month ruptured Nord Stream 1, which until Russia cut off supplies at the end of August was its main supply route to Germany.
Putin again charged that the U.S. was likely behind the explosions that ripped through both links of the Nord Stream 1 pipeline and one of the two links of the Nord Stream 2 pipeline, causing a massive gas leak and taking them out of service.
Europe is investigating what caused three pipelines in the Nord Stream network to burst in an act of suspected sabotage near Swedish and Danish waters that Moscow quickly sought to pin on the West, suggesting the United States stood to gain.
European Commission President Ursula von der Leyen said the damage last week to the Nord Stream pipelines linking Russia and Germany has "shown how vulnerable our energy infrastructure is", and a comprehensive plan is needed to ensure the safety of key EU networks
Europe is investigating what caused three pipelines in the Nord Stream network to burst in an act of suspected sabotage near Swedish and Danish waters that Moscow quickly sought to pin on the West, suggesting the United States stood to gain.
A total of four leaks were discovered last week on the Nord Stream 1 and 2 pipelines in the Baltic Sea near Denmark and Sweden, with a significant fall in gas pressure leading to the detection of the ruptures.
The Nord Stream AG company informed the Danish Energy Agency that a stable pressure now appears to have been achieved on the Nord Stream 1 pipelines.
"The magnitude of the explosions was measured at 2.3 and 2.1 on the Richter Scale, respectively, probably corresponding to an explosive load of several hundred kilos," the two countries said in a joint report to the UN Security Council.
"By organising explosions on the Nord Stream international gas pipelines that run along the bottom of the Baltic Sea they actually started destroying European energy infrastructure," Putin said.
Russia's foreign ministry on Thursday said that leaks on the Nord Stream pipelines occurred in a zone controlled by U.S. intelligence services, the RIA Novosti news agency reported citing the ministry.
Gas leaks as a result of suspected sabotage discovered on the two pipelines on Tuesday have roiled energy markets and heightened security concerns.
"Discussed the sabotage on the Nord Stream pipelines with Defence Minister Morten Bødskov," NATO Secretary-General said on Twitter.
Neither pipeline was in operation, but both contained natural gas - which is largely composed of methane, a potent greenhouse gas that is the second-biggest cause of climate change after CO2.
Three separate leaks erupted from the Nord Stream 1 and 2 pipelines, which were already caught up in the conflict over Russia’s invasion of Ukraine, sending swirling streams of methane to the surface of waters off Denmark and Sweden. Top Polish and Ukrainian leaders blamed Moscow, while Russian state media suggested US or Ukrainian involvement
Photos taken by the Danish military showed large areas of bubbles on the surface of water, emanating from the three leaks in Sweden and Denmark's economic zones north of Poland, from 200 to 1,000 metres (656 feet to 0.62 miles) in diameter.
In a single day, the conduits, which link Russia with Germany under the Baltic Sea, have suffered not one, not two, but three separate major leaks. The word sabotage springs to mind.
Denmark's armed forces on Tuesday released video showing bubbles rushing to the surface of the Baltic Sea above the pipelines, and said the largest gas leak had caused surface disturbance of well over 1 kilometre in diameter.
Nord Stream AG, the operator of the network, said earlier on Tuesday that three offshore lines of the Nord Stream gas pipeline system sustained "unprecedented" damage in one day.
Moscow blames sanctions, imposed by the West after Russia invaded Ukraine, for hampering routine operations and maintenance of Nord Stream 1.
Its the latest reduction to Nord Stream 1 that Russia has blamed on technical problems, but Germany calls a political move to sow uncertainty and push up prices amid the war in Ukraine.