KIEV, Jan. 9 – Prime Minister Yulia Tymoshenko has quietly ordered an inquiry into whether it is possible to revoke a gas supply license for UkrGaz-Energo, a monopoly supplier of imported natural gas, a newswire reported Wednesday.

The plan may be an attack on RosUkrEnergo, a Swiss-based gas trader controlled by Russian gas giant Gazprom, which owns 50% of UkrGaz-Energo. The license currently allows the company to distribute gas throughout Ukraine.