Definitely 2 bombs. Here's a video of the bomb that exploded:
https://twitter.com/antiputler_news/status/1649334709619392514
Here's a picture of the aftermath of the explosion:
.
Here's a picture of the hole that the dud made:
Speedy...recommend including the video in today's update.
Lots of possibilities on why or how this happened. I'll post my educated guesswork on today's thread. Hint: most involve stupidity.
Russia evacuated several thousands Belgorod residents from their apartments in the area of the dud bomb.
Belgorod dud bomb thought to be FAB-500.
Ukraine probing Russian air defenses today at the 3 key choke points for Crimea.