There are reports from the east of the Democratic Republic of Congo of fighting involving M23 rebels near the city of Goma.
This week the rebels have been withdrawing from towns they had seized in recent months.
This has brought hope that a peace agreement would see an end to the violence which has displaced more than 750,000 people in North Kivu province.
Correspondents say Wednesday’s violence does not appear to have involved Congolese government troops and so is not seen as a major setback to the peace process.
Militia who have been fighting alongside the Congolese army appear to be provoking the M23 by attacking.
