China has expressed its concern over North Korea's plans to launch what it called a rocket-mounted satellite.
North Korea will launch the rocket to mark the 100th birthday of its late Great Leader Kim Il-sung in April, state media reported.
Chinese state-run news agency Xinhua said Deputy Foreign Minister Zhang Zhijun met Pyongyang's ambassador to express Beijing's "worry".
Any launch would be seen as violating UN Security Council resolutions.
Mr Zhang said all sides were obliged to maintain peace on the Korean peninsula.
"We sincerely hope parties concerned stay calm and exercise restraint and avoid escalation of tension that may lead to a more complicated situation," Zhang was quoted as saying, in a report released on Saturday.
North Korea says the launch will take place between 12 and 16 April.
On Saturday, it said it had told the relevant international bodies about the launch, and would invite foreign experts and journalists to watch.
The US has said the launch is a threat to regional security and Russia has described the plan as a "serious concern".
Call for restraint
US Secretary of State Hillary Clinton called North Korea's announcement "highly provocative" and urged the country to abide by its international obligations.
"Such a missile launch would pose a threat to regional security and would also be inconsistent with North Korea's recent undertaking to refrain from long-range missile launches," she said in a statement.
A US state department spokesperson said it would be "hard to imagine" giving food aid to North Korea, as previously agreed, if Pyongyang went ahead with the rocket launch.
Neighbour South Korea said such a move would be a "clear violation" of UN Security Council Resolutions passed after a similar launch in 2009.
"It would be a grave provocation threatening the peace and security of the Korean peninsula and north-east Asia," the foreign ministry said in a statement.
Japan is particularly concerned as North Korea's April 2009 rocket was launched over the country.
The country's chief cabinet secretary, Osamu Fujimura, told a news conference on Friday that Japan had set up a crisis management taskforce to monitor the situation and was co-operating with the US and South Korea.
"We believe a launch would be a move to interfere with our effort toward a dialogue, and we strongly urge North Korea not to carry out a satellite launch," he said.
Last month, Pyongyang agreed to suspend long-range missile tests.
The agreement was part of a deal for the United States to supply 240,000 tonnes of food aid to North Korea.
It also agreed to suspend uranium enrichment and to allow back UN weapons inspectors as part of the deal.
In the launch three years ago, Pyongyang said the satellite made it into orbit and characterised it as a test of its satellite technology.
The move drew condemnation from the US and South Korea and led to the UN resolutions prohibiting the North from nuclear and ballistic missile activity.
Foreign officials said there were no indications that a satellite had reached space and that the launch was a cover for Pyongyang to test long-range missile technology.
The launch next month of a ''working satellite'', the Kwangmyongsong-3, is an opportunity for ''putting the country's technology of space use for peaceful purposes on a higher stage'', said a North Korean spokesman.
The rocket would be launched from the Solace Satellite Launching Station in Cholsan county, North Pyongan province on the country's west coast.
State media also reported that the North has already launched two experimental satellites.