South Korea's presidential office says North Korea's satellite did not reach orbit as the communist nation claims.
North Korea earlier claimed success in launching a communication satellite into space. State-run media said Sunday that the satellite was already transmitting data and patriotic odes to leader Kim Jong Il and national founder Kim Il Sung.
President Barack Obama and Japanese leader Taro Aso have called the launch a provocative move that violates a UN Security Council resolution barring North Korea from ballistic missile-related activities. A Security Council session is set for Sunday afternoon in New York.