Russia's largest state-affiliated gas company Gazprom says it is reducing the amount of natural gas that it sends to Germany via the Nord Stream pipeline by around 40 percent.
Gazprom posted a tweet on Tuesday. It attributed the supply reduction to the failure of Siemens Energy to return gas compressor units "in due time after their repair."
German firm Siemens Energy said it has been unable to return a turbine that was overhauled in Canada, due to the sanctions that Canada imposed against Russia.
The company stated that it has informed the Canadian and German governments about the situation. It added that it is working on a viable solution.
The German government says there is currently no problem with domestic supplies of natural gas.