Technical issues with North Korea's Kwangmyongsong-3 satellite have forced the North to extend the rocket launch window to December 29th, a week later than previously. According to KCNA,  a "technical deficiency" with the first-stage control engine module of the rocket is the reason for the extension.

On Saturday, a spokesman for the Korean Committee of Space Technology had told KCNA that “Our scientists and technicians…are now seriously examining the issue of readjusting the launching time of the satellite for some reasons.” The terse statement did not explain what those reasons were.