The UN Security Council is poised to hold an emergency session Sunday to deal with North Korea's rocket launch.
Japan requested an emergency session Sunday among diplomats on the 15-nation council that handles threats to international peace and security, said Yutaka Arima, a spokesman for Japan's UN mission.
That request occurred within minutes of the launch, he said.
Approval of a council meeting will come after certain formalities are handled, according to Marco Morales, a spokesman for Claude Heller, Mexico's ambassador to the UN.
Mexico holds the council presidency this month.
"As soon as we get the letter, we'll call for a meeting to be held as soon as possible," Morales said.