Kim Jong Un, third son of North Korean leader Kim Jong Il, is currently holding a low-ranking position within the National Defense Commission in preparation to succeed his father, according to recently obtained information from sources in Beijing close to the Pyongyang leadership.

The sources also expect the North to test a long-range ballistic missile and conduct another nuclear test before officially declaring Kim Jong Un as Kim Jong Il's successor.

Kim Jong Un joined the commission in April after the Supreme People's Assembly was held earlier in the month and he has been accompanying his father wherever he goes on his well-known "on the spot guidance tours," the sources said.