New satellite imagery appears to show that at least seven warplanes have exploded over Russian bases in Crimea, although Russia claims no planes were damaged by explosions this week.
The images, released Wednesday by US-based earth imaging company Planet Labs PBC, also show charred grass and several craters near the tarmac.
But Ukrainian presidential aide Oleksi Arestovich said the explosion was caused by a Ukrainian-made long-range weapon or by Ukrainian partisans operating in Crimea. Ukraine has stopped publicly
Russia has tried to downplay the explosion, saying several munitions on the base caught fire and exploded.