Update(10:16ET): Within an hour of the first videos hitting social media and widely circulating, Russia's defense ministry has said the large explosion at its Crimean Saky Airbase was not the result of an airstrike or shelling. The statement said ammunition stored at the airfield detonated, but the cause of what ignited the storage depot is still unknown and being investigated. Russian state media has published the following English-language statements of the defense ministry:

The Russian Defense Ministry has reacted to reports of explosions near the town of Novofedorovka in Crimea, saying that a detonation of several rounds of air-launched ammunition had taken place at the Saki airfield located not far from the town.

The detonated ammunition was stored at the airfield's bunded storage area, the ministry said, adding that the ensuing blasts did not result in casualties or damage to aircrafts. The resulting fire is in the process of being put out, the Defense Ministry elaborated.

The ammo's detonation did not happen due to shelling or an airstrike on the airport, the ministry underscored.