Video footage uploaded by Ukrainian special forces on Wednesday (21/8) shows an attack on several pontoon bridges in the Kursk region of Russia.
Ukraine said it destroyed the bridges with US-made weapons.
News agency Reuters can confirm some video sections of rivers, beaches and other terrain, which match satellite imagery of the area.
Kyiv has announced a series of battlefield successes since launching a surprise attack on the Kursk region earlier this month.
But Russia claims its forces have halted Kyiv's advance at Kursk, and says it has seized territory in eastern Ukraine.
The military responded to Russian movements there, Ukrainian President Volodymyr Zelenskyy said, by reinforcing its forces around Pokrovsk.
Video drone released Wednesday by Ukraine's 68th brigade shows artillery strikes on Russian forces east of Pokrovsk in the Donetsk region.
Both sides reported being targets of attacks. drone massively.
Ukraine crossed the Russian border in the Kursk region on August 6, in an attempt to divert Russian troops from other frontline areas.
Ukraine's Foreign Ministry said Kyiv had seized more territory there than Moscow had seized in Ukraine this year. (uh/lt)
