Russia suspended electricity supplies to Finland overnight after its energy firm RAO Nordic threatened to cut off supplies over payment arrears, an official for Finland’s grid operator told AFP on Saturday. “It is at zero at the moment, and that started from midnight as planned,” Timo Kaukonen, manager for operational planning at Fingrid, said. RAO Nordic had Friday said it would suspend supplies, citing problems with payments, as Helsinki prepares to announce its application for NATO membership in the wake of Moscow’s invasion of Ukraine. But the shortfall was being made up by imports from Sw…