Ukraine says it blew up Russian pontoon bridges over a key river — and units trying to cross it

Ukraine’s military says it blew up a key Russian crossing on the Siverskyi Donets River on its eastern front, inflicting heavy losses in a potentially significant blow to the Kremlin’s designs on the regions of Luhansk and Kharkiv.

Images shared by the defense ministry appeared to show a ruined pontoon crossing with dozens of destroyed or damaged armored vehicles on both banks. 

“Artillerymen of the 17th tank brigade of the #UAarmy have opened the holiday season for [Russian forces],” the ministry said on Twitter. “Some bathed in the Siverskyi Donets River, and some were burned by the May sun.”

Kyiv’s strategic communications directorate tweeted images of smoking wreckage and two ruined bridgeheads, and said that the army’s 80th Separate Assault Brigade had “destroyed all attempts by the Russian occupiers to cross” the river.

The Siverskyi Donets, which flows from southern Russia through the separatist Ukrainian regions of Kharkiv and Luhansk, has become a key barrier against Russia’s attempts to shore up the territory it has seized since invading in February.

Ukraine’s military on Wednesday said that Russian forces had been trying to gain full control over Rubizhne, a city of 55,000 people on the eastern bank of the river, and were conducting an offensive on Lyman, some 50 kilometers (about 31 miles) farther west.

“[The] Russian enemy is trying to hold positions on the right bank of the Siversky Donets River,” it said. 

Britain’s defense ministry said Thursday that despite early successes in Kharkiv, Russia had in recent days begun moving units to the eastern flank of the Siverskyi Donets in order to “reorganize and replenish its forces following heavy losses.”

In April, Ukraine blew up a bridge in the neighboring Kharkiv region in an attempt to stop Russian advances. 

“Russia has been working on…