North Korea has threatened a merciless punishment against a North Korean defectors’ group in South Korea, which sent leaflets criticizing the communist country's leader Kim Jong-un.

The North’s state-run propaganda Web site, Uriminzokkiri, said on Tuesday that abominable human scums incited by the United States and its South Korean puppets are hell-bent on sending anti-Pyongyang leaflets.

The site said that it is ridiculous to expect that the North’s supreme dignity could be belittled by a few propaganda leaflets.

The Association of North Korean Defector Organizations distributed 100-thousand leaflets across the border on Saturday, putting the North Korean leader on a wanted list and offering a 50-million dollar reward for his arrest.