Judging by the secondary detonation from video 1, they hit an ammunition storage.

According to Russian sources, there was a warehouse of NATO missiles there.

https://x.com/MyLordBebo/status/1805161890638684601?

https://x.com/MyLordBebo/status/1805162535206765019/video/1

https://x.com/MyLordBebo/status/1805187903112257583