Kiev and Moscow have filed lawsuits against each other over the gas price dispute that led to Russia cutting off Ukraine's gas supply this morning.
Russia said it has filed a lawsuit at the Stockholm arbitration court to try to recover Ukraine's $4.5 billion debt for gas.
Meanwhile, Ukrainian state gas company Naftogaz said it filed another lawsuit to try and recover $6 billion in what it said were overpayments to Gazprom.
More top news
Disneyland visitors got more than they bargained for when Johnny Depp popped up partway through the Pirates of the Caribbean ride.
United Airlines has reached an undisclosed settlement with a passenger who was dragged off one of its flights.
F1's governing body was paid $5 million after it signed a contract with the sport which favours the top teams, ITV News has discovered.