Fireball erupts at ammunition depot days after explosions destroyed at least seven of Putin's warplanes at military airport.

An ammunition depot has exploded in Crimea just days after a series of blasts destroyed at least seven Russian warplanes at a nearby air force base.

The Russian-appointed administrative leader of Mayskoye, Sergei Aksyonov, said two people had been injured in the blast after ammunition exploded at the depot.

Earlier on Tuesday morning, a transformer substation near the town of Dzhankoi, 14 miles away from the ammunition depot, caught fire according to Russia's RIA Novosti news agency.

It is not yet clear what caused the blasts but it will raise suspicions of it being a Ukrainian sabotage attack in the Putin-annexed peninsula.

The explosions come just days after a series of devastating blasts destroyed at least seven Russian warplanes and demolished ammunition storage facilities at the Saki air force base in Crimea.

It also comes a day after Ukraine launched a HIMARS strike on a Wagner military base in the occupied city of Popasna after its location was inadvertently revealed by a Russian war propagandist. 

Russia's Defence Ministry today said there were no 'serious' casualties after the fire broke out at a temporary storage area of the ammunition depot. 

Moscow said that the fire had erupted at the depot at around 6.15am local time (03.15 GMT), causing ammunition to detonate. 

Some 2,000 residents were evacuated from the area as footage appeared to show a series of explosions at the ammunition depot, with clouds of black smoke billowing into the air. 

Aksyonov said he had left for Mayskoye immediately after the first blasts and said he was investigating the circumstances surrounding the explosions. 

Crimea, which has been under Russian control since 2014 even as most of the world recognises it as Ukrainian territory, has been a major staging post for the military campaign Russia launched in Ukraine on Feb. 24.

Ukraine has not officially confirmed or denied responsibility for reported explosions in Crimea in recent days.

A reminder: Crimea of normal country is about the Black Sea, mountains, recreation and tourism, but Crimea occupied by Russians is about warehouses explosions and high risk of death for invaders and thieves,' Ukrainian Presidential advisor Mykhailo Podolyak tweeted after Tuesday's explosions.

The Russian reports did not say how many blasts occurred in total.

The explosion marks yet another embarrassing loss for Russian President Vladimir Putin as it comes just days after a series of blasts ravaged the Saki air force base in Crimea.

At least seven Russian fighter jets were destroyed and ammunition storage facilities were destroyed in the explosions on August 9.