North Korea has said its failed military satellite launch last month was the "gravest failure," state media KCNA reported on Monday.
The enlarged plenary meeting was held between Friday and Sunday, ordering workers and researchers to analyze the failed military satellite launch and prepare for another in the near future.
Those in charge of the satellite launch were "heavily criticized," the report said.
The North Korean rocket plunged into the sea "after losing thrust due to the abnormal starting of the second-stage engine," Pyongyang said after the launch failure in an unusually candid admission of a technical problem.
North Korea also vowed it will continue to develop its nuclear capability.
