As expected, Russia stopped gas deliveries via Nord Stream 1 to Europe on Wednesday night.
Physical gas flow from Russia to Germany via the Baltic Sea pipeline fell to zero, data from entry point operators showed.
The Russian state-owned company Gazprom announced almost two weeks ago that the pipeline would be closed from August 31 to September 2 for maintenance work.
Russia blames technical problems caused by Western sanctions for stopping gas supplies, while Germany and France, for example, accuse Russia of using gas supplies as a weapon of war.
Germany is particularly dependent on Russian gas and is desperately trying to find other suppliers.