Power outages were reported in parts of Crimea late last night.
The regional power company blamed them on technical problems in a power line from the Ukrainian mainland to the Black Sea peninsula, which has been annexed by Moscow in a move rejected by Kyiv and the West.
Local residents said there was no electricity in several cities in Crimea, including parts of the regional capital, Simferopol.
Crimea's power provider Krymenergo said it introduced partial power cuts after a line operated by Ukraine's national electricity company, Ukrenergo, was hit by a technical fault and went down for repairs.
There's been no word from Ukrenegro on the matter.
Most of Crimea's electricity -- as well as water and food -- is supplied from the Ukrainian mainland.
Deputy Premier of Crimea Rustam Temirgaliyev, accused Kyiv of reducing electricity to the peninsula to "blackmail" Moscow, ITAR-TASS reported.