Singapore, June 4, SPA -- The United States and two chief Asianallies, Japan and South Korea, warned Saturday that NorthKorea's development of nuclear weapons poses a grave threatto global security and said dialogue was the only solutionto the standoff. At a forum of Asia-Pacific defense leaders, U.S. Secretaryof Defense Donald H. Rumsfeld said North Korea might bewilling to sell nuclear technology, and South KoreanDefense Minister Yoon Kwang-ung said the North's activitiescould lead to a nuclear arms race in the region. Japan's defense chief, Yoshinori Ono, also expressedconcerns over Pyongyang's nuclear ambitions and stressedthe need to revive six-party nuclear disarmament talks. Thelast round of negotiations was held a year ago. North Korea was not invited to the annual conference,where delegates discussed a host of other issues, includingmaritime security, terrorism and the growing influence ofChina. --SPA1415 Local Time 1115 GMT www.spa.gov.sa/267368