Ukraine ambushes Russian convoy in Kursk as Kremlin declares emergency

Commentators said the attack, reminiscent of Ukrainian attacks on Russian troops besieging Kyiv in the first weeks of the war, demonstrated an effective hit-and-run strategy, but the incursion appeared likely to draw an escalating response from the Kremlin, and its overall outcome remains profoundly uncertain.

The fast-moving fighting and limited sources of information mean it is hard to be sure where the frontlines are in the sector.

The Russian bloggers said that Ukraine had pushed up three roads to the north-east, north and north-west of the town, including where a railway and likely supply route runs to the Russian city of Belgorod in the east.