Students in North Korea are singing songs in praise of Kim Jong Il's third son and potential successor, Kim Jong Un, a recently obtained report said, indicating that a full-scale power shift may be on as news of the North Korean leader's ailing health fuels speculation over who will lead the reclusive state in the days ahead.

Lee Young Hwa, head of Osaka-based activist organization Rescue the North Korean People! (RENK) said he had received word from a "collaborator" in the North who reported that when a group of elementary school children on a street corner in Pyongyang were asked what they were singing, they replied it was a song about Kim Jong Un.

The students said they were forced to practice the song all day long instead of taking their regular classes, and could not return home until they had thoroughly memorized it.