North confirmed it had conducted its fifth nuclear test.
China bans exports of nuclear-use technology to North Korea
Obama had been briefed on board Air Force One by National
Security Adviser Susan Rice about reported seismic activity near
North Korea's nuclear test site earlier on Friday, White House
press secretary Josh Earnest said. Obama reiterated the unbreakable US commitment to the security of its allies in Asia and around the world, Earnest said.
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