US, France pledged to work to denuclearize North Korea
The agreement came during telephonic talks between US President Donald Trump and his French counterpart Emmanuel Macron.
A White House statement said the two leaders discussed the increasingly dangerous situation arising out of North Korea's escalating behavior.
Donald Trump again invoked the grim possibility of military measures if other steps fail.
Trump's latest warning came amid calls from China, Russia, Germany, Britain and the United Nations, urging him to show greater rhetorical restraint.