Text of UN Security Council statement on North Korea's nuclear weapon test agreed on Tuesday by the 15-nation body:
"The members of the Security Council held urgent consultations to address the serious situation arising from the nuclear test conducted by the Democratic People's Republic of Korea (DPRK).
"The members of the Security Council strongly condemned this test, which is a grave violation of Security Council resolution 1718 (2006), 1874 (2009) and 2087 (2013), and therefore there continues to exist a clear threat to international peace and security.
"The members of the Security Council recalled that in January they unanimously adopted resolution 2087, which expressed the council's determination to take 'significant action' in the event of a further DPRK nuclear test.
"In line with this commitment and the gravity of this violation, the members of the Security Council will begin work immediately on appropriate measures in a Security Council resolution."