Key Russian railway bridge destroyed in Belgorod near border with Ukraine

Russia relies heavily on rail to move its military equipment. The bridge sits just four miles from the border on a rail line that goes south into Ukraine and lies on a supply line between Russia and the territory it holds close to the city of Izyum near the Donbas.

Ukrainian officials said that Russia may seek to drive public opinion in support of the war by staging attacks that can then be blamed on Ukraine.

As Russia shifts its military toward the east, there are signs that the military is increasing controls in its border regions.

The attacks on relay switches and other infrastructure had briefly shut down major routes, including the line from Minsk to the besieged Ukrainian city of Chernihiv.