N'DJAMENA, Nov 29 (Reuters) - Chad proposed on Wednesday to move camps housing more than 200,000 Sudanese refugees away from its violent border with Sudan to safer sites several hundred kilometres (miles) away to the west. In a speech to foreign ambassadors, Foreign Minister Ahmat Allam-Mi also said Chad was "in a state of war" due to attacks by rebels he said were backed by Sudan and "circles close to the royal family" of Saudi Arabia.