Large parts of Bilasuvar city and surrounding villages remained without electricity for more than two hours, with the cause of the outage still unknown.
Residents reported the disruption to Azerbaijani news outlet Report.
They said a substantial part of the district center and settlements across Bilasuvar District were still without power.
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Authorities had not issued an official explanation for the outage or announced when electricity would be restored at the time of publication.
Rain and thunderstorms were reported in the area, but officials had not confirmed any connection between the weather and the power failure.