South Sudan's President Salva Kiir says the actions of neighboring Sudan amount to a declaration of war.
His remarks Tuesday came during talks with Chinese President Hu Jintao in Beijing. Mr. Kiir is in China on a five-day trip that will include opening a new embassy for South Sudan.
The U.S., China and other world powers have called on Sudan and South Sudan to stop fighting and resume peace talks.
Sudan's president, Omar al-Bashir, said Monday there will be no further talks and that the south only understands the language of “guns and ammunition.”