The Energy Ministry of the Russian Federation reported that the agreement had expired last year, Kommersant newspaper reports. "Russia isn't conducting any talks on supplying electricity from Russia to Ukraine. We won't prolong it [the contract] as it was tied to an agreement on the supplies of Ukrainian electricity to Crimea," reads the article. As reported, in 2014, Ukraine purchased electric power from the Russian power grids under an agreement between the companies Inter RAO and Ukrinterenergo that was effective through to the end of 2015. Early January, several Ukrainian power companies were affected by the powerful cyber attack, which could result in their damage.