Explosion at ammo depot in Russia.
Could be caused by Ukrainians or Russian induced accident.
https://twitter.com/Liveuamap/status/1508874225393754114
Looks like Belgorod is within Bayraktar range from Kharkiv.
The Russians have been bringing forward replacements, reinforcements and resupply from all over, and Belgorod is one of their main staging areas for it. It could also easily be an industrial accident, with all the piles of munitions moving around there.
Vodka and munitions handling do not mix.