KIEV, Dec. 2 – JKX Oil & Gas plc, which has assets in Ukraine, forecasts that its gas sales in Ukraine may reduce by up to 50% in December due to the Ukrainian government's decision to make over 150 industrial companies buy gas solely from Naftogaz Ukrayiny.

"The Ukrainian government issued a decree on November 29 directing major industrial buyers to acquire their gas solely from the Ukraine state-owned gas company Naftogaz during the three-month period commencing today. A number of these named entities were previously contracted to receive gas produced by JKX's Ukrainian subsidiary in the period," JKX said in a statement on the London Stock Exchange.