Congo, M23 rebels to sign declaration of principles to end fighting, sources say

(Reuters) -Congo and the M23 rebel group have agreed to a declaration of principles to end fighting in eastern Congo, a sign of progress after months of talks mediated by Qatar, though key details still need to be negotiated, four sources said on Friday.

(Reporting by Sonia Rolley and Stanis Bujakera;Writing by Robbie Corey-Boulet; Editing by Chris Reese)