NEW : If civilians were killed , deaths may constitute war crimes , spokesman says . U.N. chief : Rebels in east Congo pose `` poisonous consequences '' for country . " Comment: The UN has a lot of experience with this sort of thing and isn't going to be swayed by the rebels's propaganda or their own internal politics. Some analysts say Rwanda is Nkunda 's principal supporter . Battles between warlord Laurent Nkunda 's rebels and army spreading , U.N. says .
NEW : If civilians were killed , deaths may constitute war crimes , spokesman says . U.N. chief : Rebels in east Congo pose `` poisonous consequences '' for country . " Comment: The UN has a lot of experience with this sort of thing and isn't going to be swayed by the rebels's propaganda or their own internal politics. Battles between warlord Laurent Nkunda 's rebels and army spreading , U.N. says .