Russian drone attacks in northern Ukraine Saturday cut power to a northern city and knocked out its water supply, according to local officials.

Suspilne, a public broadcaster, reported a series of explosions in Sumy, northeast of the capital Kyiv. It quoted municipal officials as saying water supplies had been temporarily cut.

Since March, Russian forces have intensified their bombardments of the Ukrainian power sector, knocking out the bulk of the thermal and hydropower generation and forcing long blackouts across the country. 

The Sumy region is subject to almost daily shelling from Russian positions across the border.

Russian troops staged a cross-border incursion in May in adjacent Kharkiv region and officials have reported a periodic buildup of troops near the Sumy region.

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