KIEV, Feb. 6 - Gas stocks in Ukraine's underground storage facilities declined by 35% to 9.58 billion cubic meters (bcm) since October 13, when the current heating season began, through February 4.

Ukraine withdrew 58.89 million cubic meters (mcm) from underground storage on February 4 and a total of 304.63 mcm in the first four days of February (75.16 mcm/day on average), Ukrtransgaz, which operates the country's pipelines and storage facilities, said in a statement.