"[W]e know that roughly 2000 metric tons of nuclear weapons usable materials — highly enriched uranium and separated plutonium — are present in both civilian and military programs," the statement said on Tuesday. "[W]e know that terrorists have the intent and the capability to turn these raw materials into a nuclear device if they were to gain access to them."
The fourth Nuclear Security Summit is scheduled to take place in Washington, DC from March 31 to April 1, and will be attended by leaders from more than 50 countries.
It added that such a potential attack would create "political, economic, social, psychological and environmental havoc around the world," regardless of where it would occur.
Earlier in February, the Iraqi government said radioactive material it characterized as highly dangerous went missing from a bunker where it was stored in November 2015.