Ukraine aims to bring war closer to Russian citizenspublished at 15:54 Greenwich Mean Time 30 December 2023
James Waterhouse
Ukraine correspondent in Kyiv
Belgorod is about 20 miles (32km) from the border with Ukraine. Air strikes in cities like this are uncommon but not unprecedented.
We're told nearby Bryansk was also targeted. Reports say a large microelectronics factory was hit. Russian officials are claiming homes were destroyed and children are among the dead.
Ukrainian intelligence sources have been quoted in the media as saying more than 70 drones were used in a series of strikes on military targets.
Kyiv rarely admits to such attacks across the border, although it has carried out strikes like this before.
Its aim has always appeared less military-focussed, and more to bring the invasion closer to the Russians citizens. This time, the strikes came a day after Moscow carried out its biggest ever aerial bombardment of Ukrainian cities.
The Kremlin says Vladimir Putin has been briefed on today's attacks.