Ukraine said it had struck a second key bridge in the Kursk region on Sunday.
Kyiv is seeking to disrupt Moscow’s supply routes as its unprecedented incursion on Russian soil stretched through its second week.
“Minus one more bridge,” Mykola Oleshchuk, the Ukrainian air force commander said on Telegram, publishing an aerial video of a blast tearing through a bridge near the Russian town of Zvannoye.
“The air force aviation continues to deprive the enemy of logistical capabilities with precision air strikes.”
It was not clear when Ukraine carried out the attack. Mr Oleshchuk did not give a date and Russian military bloggers shared photos of destruction from what appeared to be the same bridge dated Saturday.
Kyiv sent troops and armoured vehicles across the border on Aug 6, in its biggest attack on Russian territory yet.
On Friday, Ukraine announced it had destroyed a separate bridge in the neighbouring town of Glushkovo, both of which lie on the river Seym that winds through the region.
The attacks on both bridges have left Russia with limited options to cross the river in the area, according to Russian military bloggers.
More than 120,000 people have fled the region since fighting began, according to Russian authorities.
Meanwhile, Russia ramped up pressure in east Ukraine, claiming to capture the village of Svyrydonivka just nine miles from the Ukrainian-held logistics hub of Pokrovsk.
Pokrovsk lies on the intersection of a key road that supplies Ukrainian troops and towns across the eastern front and has long been a target for the Russian army.