A ceasefire has taken effect in the east of the Democratic Republic of Congo, although it is not clear whether it is being respected.
The UN Secretary General has urged the M23 rebel group to stop fighting and withdraw from captured territory.
The rebels launched fresh attacks on Congolese army positions on Monday, seizing a town and several villages.
Rwanda denies backing the M23 which has captured large swathes of territory over the past year and is threatening the regional capital Goma.
