European countries on Tuesday raced to investigate unexplained leaks in two Russian gas pipelines running under the Baltic Sea near Sweden and Denmark, infrastructure at the heart of an energy crisis since Russia’s invasion of Ukraine.
Experts and also Russia, which built the network, said the possibility of sabotage could not be ruled out.
Sweden’s Maritime Authority issued a warning about two leaks in the Nord Stream 1 pipeline, shortly after a leak on the nearby Nord Stream 2 pipeline was discovered that had prompted Denmark to restrict shipping in a five nautical mile radius.
Both pipelines have been flash points in an escalating energy war between European capitals and Moscow that has pummeled major Western economies, sent gas prices soaring and sparked a hunt for alternative energy supplies.
Russia said the leak in the Russian network was cause for concern and sabotage was one possible cause. “No option can be ruled out right now,” Kremlin spokesman Dmitry Peskov told reporters.
Neither pipeline was pumping gas to Europe at the time the leaks were found amid the dispute over the war in Ukraine, but the incidents will scupper any remaining expectations that Europe could receive gas via Nord Stream 1 before winter.
“The destruction that occurred on the same day simultaneously on three strings of the offshore gas pipelines of the Nord Stream system is unprecedented,” said network operator Nord Stream AG. “It is not yet possible to estimate the timing of the restoration of the gas transport infrastructure.”
Although neither were in operation, both pipelines still contained gas under pressure.
Denmark’s energy minister Dan Jorgensen said in a written comment leaking gas had been detected in Nord Stream 2 on Monday between Russia and Denmark.
Gazprom, the Kremlin-controlled company with a monopoly on Russian gas exports by pipeline, declined comment.
Russia slashed gas supplies to Europe via Nord Stream 1 before suspending flows altogether in August, blaming Western sanctions for causing technical difficulties. European politicians say that was a pretext to stop supplying gas.
The new Nord Stream 2 pipeline had yet to enter commercial operations. The plan to use it to supply gas was scrapped by Germany days before Russia sent troops into Ukraine in February.
The leaks happened just before the ceremonial launch on Tuesday of the Baltic Pipe carrying gas from Norway to Poland, a centerpiece of Warsaw’s efforts to diversify from Russian supplies.
Norway’s Petroleum Safety Authority (PSA) had urged oil companies on Monday to be vigilant about unidentified drones seen flying near Norwegian offshore oil and gas platforms, warning of possible attacks.
A spokesperson for the Swedish Maritime Administration (SMA) said there were two leaks on Nord Stream 1, one in the Swedish economic zone and another in the Danish zone, adding that both leaks were in an area northeast of the Danish island Bornholm.
“We are keeping extra watch to make sure no ship comes too close to the site,” a second SMA spokesperson said.
Vessels could lose buoyancy if they enter the area, and there might be a risk of leaked gas igniting over the water and in the air, the Danish energy agency said, adding there were no security risks associated with the leak outside the exclusion zone.
The leak would only affect the environment locally, which means that only the area where the gas plume in the water column is located would be affected, it said, adding that escaping greenhouse gas methane would have a damaging impact on the climate.