North Korea has launched a long-range rocket which it claims is carrying 'a satellite'.
The launch was made in defiance of United Nations sanctions barring Pyongyang from using ballistic missile technology.
The US strongly condemned the event as a "destabilising and provocative action".
An emergency meeting of UN Security Council members is to be held to agree a collective response.
The UN Security Council has strongly condemned North Korea's rocket launch.
The Security Council has reiterated its intent to take "significant measures" in response to the nuclear test in January, it said in a statement.
"The members of the Security Council strongly condemned this launch," Venezuelan Ambassador Rafael Dario Ramirez Carreno, president of the council this month, told reporters.
He said the launch was "a serious violation of Security Council resolutions."
U.S. Ambassador Samantha Power told reporters: "We will ensure that the Security Council imposes serious consequences. DPRK's (North Korea) latest transgressions require our response to be even firmer."
The United States and China began discussing a U.N. sanctions resolution after Pyongyang's Jan. 6 atomic test.
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