KIEV, Aug. 18 - Ukraine boosted natural gas reserves in its underground gas storage facilities by 1%, or by 150 million cubic meters, over the past week, data released by Gas Storage Europe over the weekend indicate.

Ukraine stockpiled 15.21 billion cu m of natural gas as of August 15, compared with 15.06 Bcm as of August 8, according to GSE, a non-profit Brussels-based organization that provides energy statistics to the EU.