Russia has 'very nearly exhausted' its supply of Iranian-built drones that it has been using to wreak terror on Ukraine, according to Britain's Ministry of Defence.

The Daily Mail reported since October 10, Russia has launched six massive aerial attacks against Ukraine's power grid and other infrastructure, and has used the Unmanned Aerial Vehicles (UAVs) to overwhelm Ukraine's air defences and strike deep into Kyiv's territory.

Analysts believe Moscow has been using the drones to compensate for a shortage of cruise missiles, having conducted thousands of strikes across Ukraine since Vladimir Putin launched his brutal invasion of the country on February 24.

The website said now, after carrying out hundreds of attacks with the Iranian-made Shahed-136 'suicide' drones, Britain's MoD has said Russia's UAV supply is also running low.

Read the full report here.