The main pipeline "Nord Stream" that sends natural gas from Russia to Germany has been suspended from the 11th due to regular inspections.
There is growing concern that supply will not resume after inspections as the Russian side shakes Germany, which imposes economic sanctions.
Nord Stream is currently Europe's largest natural gas pipeline, connecting Russia through the bottom of the Baltic Sea to Germany.
Russia's state-owned gas company Gazprom, which operates this pipeline, has stopped supplying natural gas from Russia to Germany on the 11th due to regular inspections.
The inspection is scheduled for the 21st of this month.
Around this pipeline, supply from Russia was cut by about 60% last month.
The German government is in an unusual situation asking people and businesses to save gas, saying it cannot stockpile enough for the winter when heating demand increases.
As a result, there is growing concern in Germany that supply will not be resumed after the inspection, as the Russian side will shake Germany, which imposes economic sanctions, on this regular inspection as well.
A German government official said at a regular press conference on the 11th that the pipeline inspection was "restarted, but it is unpredictable."
Germany is pushing ahead with energy de-Russia, but Russia's share of natural gas imports still accounts for 35% as of April.