Russia 's gas monopoly Gazprom accused Ukraine of cutting supplies . Gazprom cuts off gas supplies to Ukraine on New Year 's Eve . Russian energy giant Gazprom has accused Ukraine of siphoning off gas intended for European customers as the standoff between them worsens . Company says Ukraine owes it about $ 2 billion for past natural gas sales . Gas supplies to other European customers may be affected .
Russia 's gas monopoly Gazprom accused Ukraine of cutting supplies . Gazprom cuts off gas supplies to Ukraine on New Year 's Eve . Company says Ukraine owes it about $ 2 billion for past natural gas sales . Gas supplies to other European customers may be affected .