North Korea issues warning about summit

North Korea said Wednesday there must be no mention of its nuclear weapons program during next week\'s global summit in Seoul. A government dispatch monitored in Seoul said \"any provocation against us will be considered a declaration of war,\" South Korea\'s Yonhap news agency reported. Pyongyang also said the North Korean nuclear issue \"in fact does not exist\" and has no reason to be discussed at the March 26-27 Nuclear Security Summit. The warning comes two days after South Korean President Lee Myung-bak said the summit is expected to serve as a venue to drum up international support for resolving the South\'s nuclear standoff with the North. Top leaders from some 50 nations, including US President Barack Obama and Chinese President Hu Jintao, are expected to attend the summit.