North Korea slams 'feeble' Biden

SEOUL: North Korea has described Joe Biden as an "old man in his senility", in a characteristically colourful personal attack on the US president after he accused the Russian leader of war crimes in Ukraine.

The diatribe came after Biden called Russian President Vladimir Putin "a war criminal" and called for him to be put on trial over alleged atrocities against civilians in Ukraine's Bucha.

"The latest story is the US chief executive who spoke ill of the Russian president with groundless data," said a commentary carried by the official KCNA news agency on Saturday.

"Such reckless remarks can be made only by the descendants of Yankees, master hand at aggression and plot-breeding," it added.

It described Biden as a "president known for his repeated slip of tongue", but stopped short of referring to him by name.