North Koreans have gathered in Pyongyang for a mass rally to celebrate Wednesday's long-range rocket launch. State television showed huge crowds cheering to mark the launch, which has been condemned by many nations as a banned test of missile technology.

South Korea, meanwhile, says it has retrieved debris from the rocket and will study it to assess its technology. The first stage of the rocket fell west of the Korean peninsula. South Korea's navy located it shortly afterwards. It was North Korea's first successful use of a three-stage rocket to put a satellite into orbit.

North Korea said on Friday that more launches would go ahead. The UN Security Council has condemned the launch, calling it a missile test that violated two UN resolutions banning Pyongyang from such activities passed after its nuclear tests in 2006 and 2009.

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