Huge fireball explosion seen in sky over Ukraine's capital Kyiv-(1080p)

A large explosion in the sky above Ukraine's capital of Kyiv has been captured on camera.

Video has confirmed it is in the Poznyaky neighbourhood.

KYIV is under attack by groups of Russian troops wearing Ukrainian uniforms in the latest ploy by mad tyrant Vladimir Putin.

Ukrainian troops are reported to have killed a number of disguised soldiers as the capital prepares for a long bloody siege.

It comes as citizens were urged to take up arms, make up Molotov cocktail fire bombs, and to use commercial drones to defend their homes.

Some 18,000 assault rifles have been handed out to residents and general mobilisation has been ordered in a bid to protect their homes.

And meanwhile, Russia claims it has retaken the key airfield of Gostomel close to the city after a back-and-forth battle.

Putin's forces boasted they had swooped in with 200 helicopters and paratroopers to seize the location.

Gunfire has reportedly been heard around Kyiv amid a flurry of skirmishes in the Oblonon district and the city centre.