Hackers left a horrifying message on the Kremlin's Yunarmiya (Young Army) website, urging Russians to "kill" Vladimir Putin.

The 1.6 million-member organisation has been compared to the Hitler Youth movement and is used by the Kremlin to indoctrinate and militarise young children in Russia.

In a split image posted to the site, the hackers took aim at the Russian dictator and his bloody war in Ukraine.

One half of the image shows a Russian Lada car, which is accompanied by text saying: "Trade your brat [of a husband] for a home-made Lada."

This is a reference to compensation packages paid to the wives and families of Russian soldiers killed in Ukraine.

The other half of the image shows a notorious photo of Putin embracing a young boy on Red Square.

A thought bubble above Putin reads: "Wrap this one up in a [black funeral] bag, too", while a line below says: "Yunarmiya - your best, short future."

Again these are references to the horrific numbers of casualties sustained by Putin's army since launching its full-scale invasion over two-and-half years ago.

Emblazoned in capital letters across the bottom of the entire image are the chilling words: "KILL PUTIN".

Yunarmiya was set up in 2015 for children aged between eight and 18 with the aim of indoctrinating them in militarism and patriotism.

Evidence has emerged that Ukrainian children living in the Russina-occupied areas of Donetsk region have been forcibly drafted into the ranks of Yunarmiya.

In June, Ukraine's National Resistance Centre (NRC) claimed up to 100 had been forced to join the militaristic organisation.

The NRC said: "The TOT [temporarily occupied territories] is building a network of 'Yunarmiyas' – the Russian equivalent of the Nazi 'Hitler Youth' movement, a militaristic movement of teenagers that is to become the basis of the Russian armed forces in the future.

"In June, up to a hundred Ukrainian teenagers took the oath of allegiance to the enemy movement at Savur-Mohyla.

"In the future, they will become the basis for training in military schools under the Russian Ministry of Defence."

The NRC noted that the Russians lure teenagers by promising their parents social advancement for their children.