Situacija je dodatno pogoršana time što je isporuka ruskog prirodnog gasa za Bugarsku, koja ide preko Ukrajine, bila presječena 6. januara, zbog produbljenja spora oko plaćanja za gas između Moskve i Kijeva, u sred jedne od najhladnijih zima zadnjih godina.
To make things worse, Russian natural gas supplies to Bulgaria, pumped via Ukraine, were cut off on January 6th amid a deepening gas payments dispute between Moscow and Kiev in the midst of one of the coldest winters in years.