Pro-Ukrainian activists have so far prevented repairs to the damaged pylons and associated power lines.
"Today or tomorrow gas deliveries will be stopped because of lack of advance payment," said Novak, saying Ukraine was in any case using very little Russian gas.
He complained that Ukrainian authorities were not doing what they needed to allow repair crews to restore power to Crimea "out of some kind of political motivation", calling their inaction a crime.
"There are different options, political ones, economic ones," said Novak, when asked how Russia could retaliate.
"Russia delivers coal to the Ukrainian energy sector. We could, and maybe in this situation we need to, take a decision about halting deliveries of coal by our commercial organizations which deliver coal to Ukrainian power stations."
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