South Korea's defense minister said on Saturday that some countries were "ignoring North Korea's unlawful behavior."
"This creates holes in sanctions against North Korea passed at the UN Security Council," Defence Minister Lee Jong-sup said during a speech at the Shangri-La Dialogue in Singapore, Asia's top security summit.
China and Russia on Friday ignored a US call for the UN Security Council to unite in condemning North Korea for a recent attempted satellite launch and instead blamed Washington for raising tensions on the Korean peninsula.