KIEV, June 14 ??“ Naftogaz Ukrayiny, the national oil and gas company, owes about $700 million to gas traders for gas supplies earlier this year, much more than has been earlier reported, an official said Wednesday.

Naftogaz owes $600 million to RosUkrEnergo, a Swiss-registered gas trader controlled by Gazprom, and about $100 million to Ukrgaz-Energo, a joint venture in which RosUkrEnergo owns 50%.