Emergency power outages as residents urged to seek shelterpublished at 07:00 Greenwich Mean Time
Here's a little more detail from the statement by Ukraine's energy minister.
"Attacks on energy facilities are taking place all over Ukraine," Herman Halushchenko says in a post on social media.
The country's state-owned energy operator, Ukrenergo, has "urgently introduced emergency power outages", he adds.
He urges residents to regularly check official updates and to seek shelter.