Nonetheless, "that does not imply that we are going to intervene," he stressed.
Earlier on Thursday, Russian daily Kommersant reported that the country`s gas monopoly, Gazprom, was considering cutting off gas supplies to Ukraine in a row over alleged debts.
That follows an earlier dispute in January which saw Gazprom shut off all gas supplies to Ukraine, and through it to Europe, in a move which sparked widespread shortages in the EU.
Under the EU`s current rules, the bloc can only step in to help member states cope with gas cut-offs once industries and national governments have taken their own measures.
The commission is currently working on a revised version of the rules aimed at boosting solidarity and crisis management.
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