April 4 (UPI) -- The United Nations secretary general has called on North Korea to join the Chemical Weapons Convention, which bans member states from producing and using deadly agents like the chemical used to assassinate Kim Jong Nam in Malaysia.
U.N. Secretary-General Antonio Guterres and Organization for the Prohibition of Chemical Weapons Director-General Ahmet Uzumcu sent a letter to Pyongyang's Foreign Minister Ri Yong Ho on Thursday, according to South Korea's foreign ministry.