Democratic Republic of Congo and the M23 rebel group pledged to sign a peace agreement by August 18, at a ceremony in Doha on Saturday, a sign of progress even as outstanding details need to be negotiated.

(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.

The Democratic Republic of Congo and M23 rebels have signed a ceasefire deal in Qatar to end fighting between the warring sides. Dubbed the Declaration of Principles, Saturday's agreement seen by the BBC, says both sides must refrain from attacks, "hate propaganda" and "any attempt to seize by force new positions on the ground".