Ukrainian strikes disrupted power and heating to two major Russian cities near the Ukrainian border, local Russian officials reported Sunday.

The report comes as Russia and Ukraine have traded almost daily assaults on each other’s energy infrastructure and U.S.-led diplomatic efforts to stop the nearly four-year war have not advanced.

Elsewhere, Ukraine's top diplomat accused Moscow of deliberately endangering nuclear safety, as he said Russia’s mass drone and missile attack on Friday struck substations that power two nuclear power plants.

Andrii Sybiha's comments came as Moscow and Kyiv continue to blame each other for strikes that severed the main power supply for weeks to Europe's largest atomic plant.

Power knocked out in two Russian cities

A drone strike temporarily caused blacko

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