Explosions were heard in Belgorod, Russia, on 30 December, and wreckage fell in the city centre after the work of Russian air defence.
Source: source of Ukrainska Pravda in security services
Details: It is noted that the Ukrainian Defence Forces struck Russian military facilities in Belgorod Oblast, but unprofessional actions of Russian air defence caused wreckage to fall in the city centre.
According to the Russians, 10 fires broke out in the city after the explosions. An air-raid warning was issued and people were urged to find shelter.
Ukraine doesn’t have a lot to gain by intentionally targeting Russian civilians. They would lose support from the West (because they’re not Israel), and they don’t have the resources to enact a sustained terror campaign like Russia does.
There are a lot of Ukrainians and sympathisers in Russia. A terror campaign wouldn’t be with drones, but strategically placed explosives.
Extremely unlikely. Nobody has ever lost Western support for targeting civilians before.
Ukraine isn’t treated the same as Israel. Israel can apparently do whatever the hell they want.