KIEV, Sept. 29 - Naftogaz Ukrayiny, as a result of its temporary loss of control over the assets of Chornomornaftogaz, has lost around UAH 13.8 billion, according to an annual report.

"In addition, in 2014 the group recognized impairment of other assets (property and debtor indebtedness), located in Crimea, in the amount of UAH 5.8 billion within other operating expenses," reads the report.