Ukrainian forces have attacked Russian territory with dozens of drones in the last few hours, also hitting a refinery in Nizhny Novgorod, hundreds of kilometers from the border.
One of the refinery's units, in the Kstov industrial area, caught fire, the region's governor said, quoted by Ria Novosti.
The Defense Ministry said that at least 25 Ukrainian drones were shot down in various regions, including two in Moscow and one in St. Petersburg.
No casualties have been reported.
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