The Nuclear Terrorism Convention (formally, the International Convention for the Suppression of Acts of Nuclear Terrorism) is a 2005 United Nations treaty designed to criminalize acts of nuclear terrorism and to promote police and judicial cooperation to prevent, investigate and punish those acts. As of February 2021, the convention has 115 signatories and 117 state parties, including the nuclear powers China, France, India, Russia, the United Kingdom, and the United States. Most recently, Saint Kitts and Nevis acceded to the convention on 13 August 2020.