North Korea has launched a long-range rocket, according to South Korea and the United States.
The planned launch has been widely condemned by the international community, which has accused North Korea of trying to develop its military technology.
Pyongyang said that the rocket would peacefully advance its space programme.
Reports from US, South Korean and Japanese officials suggest the launch failed shortly after take-off.
South Korean defence officials told reporters they believed the rocket had "disintegrated into several pieces" minutes after it launched.
Japan and South Korea had previously warned that they will shoot the rocket down if it enters their territory.