Natural gas stocks held in the underground storage facilities of Ukraine have increased to 12.8 billion cubic meters (bcm), the press service of public joint-stock company Ukrtransgaz reported on Monday.

The press service said that from July 1 to July 26, a total of 800 million cubic meters of gas was pumped to the underground storage facilities, and as of the morning on July 27 some 40.8 million cubic meters of gas a day is being pumped.

Since early 2015, around 5.2 bcm of gas has been pumped to Ukrainian underground storage facilities.

Ukrtransgaz, which is 100% owned by Naftogaz Ukrainy, operates a system of trunk pipelines and 12 underground storage facilities in Ukraine.