On Friday the German government seized control of a major Russian-owned oil refinery. A unit of Russian oil firm Rosneft is now under the trusteeship of the German industry regulator. Its taken over the business' Schwedt refinery, which supplies 90% of Berlin's fuel.
More info here: Germany Tightens Control Over Industry With Russian Oil Grab

and here: Germany takes control of Russian-owned refinery amid energy crisis

This raises the stakes with risks of further retaliation from Putin, further restrictions of Russian energy flow in Europe.

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Hapless Russian leader Putin:

putin 11 May 2022