The Russian army was test firing its Avanguard missile at the same period. One of the tests failed and hit a building block.

One testimony in a Communist forum (Zavtra.ru) mentions seeing a “meteor” in the sky on the morning of the blast.

When looking at the “blast” the evidence of a quasi-vertical impact of a kinetic energy projectile without any explosive charge is obvious.

Vladimir Putin talking to a young victim, holding his own belly and almost crying, like “it’s my baby, pleaaaase don’t talk about what you have seen” :

This piece handled by the team looks abnormal, metallic, heavy stuff. From the missile obviously and quickly taken out of the scene.

An hypersonic missile is of course very sensitive to disruptions in its path…

(images taken from Daily Mail article)