Was Moscow blown up by rockets? No, that's not true: Video posted in support of the claim actually shows footage from a Russian airstrike on a mall in central Ukraine.
The claim appeared in a Facebook post on June 28, 2022. It includes a roughly 12-minute video and a caption that reads:
KREMLIN Electricity is Under Attack! PUTIN Panics When Moscow is Blown up by 2 Rockets............
This is what the post looked like on Facebook at the time of writing:
(Source: Facebook screenshot taken on Fri Jul 1 14:54:08 2022 UTC)
The video opens with footage of a building on fire, showing large plumes of smoke and emergency personnel responding to the scene. A voice in the video says:
Moscow explodes. Putin panicked and the Russian capital turned into a sea of fire after being attacked by two mysterious missiles.
Contrary to what the video alleges, the footage is not from Moscow. It's from Ukraine and shows the aftermath of a Russian airstrike on a shopping mall in Kremenchuk, in central Ukraine.
Various media outlets covered the June 27, 2022, attack, as can be seen here and here. CNN's report on the attack included what looked to be the exact same video as the Facebook post.
Unrelated, there was a fire at a business center in western Moscow on June 3, 2022, according to Russia's state news agency TASS. TASS reported a source saying that the fire was caused by a short circuit, brought on by improper light installation.