M23 group denies allegation of killing 50 civilians in eastern Kishishe village but confirms fresh fighting with DRC's military in North Kivu province that borders Uganda and Rwanda.
The rebels had said the ceasefire didn't "concern" them as the deal was struck with Rwanda, not M23.
African leaders declare a ceasefire and say the M23 rebels must withdraw from occupied territory or face intervention, but protesters say the deal does not tackle Rwanda's alleged backing of the group.
"There was nobody in the summit (from M23), so it doesn't really concern us," M23 rebel spokesperson says of truce deal signed by the African neighbours in Angola.
Fresh talks are taking place in the backdrop of heavy fighting between M23 rebels and government forces, which have led to unprecedented civilian displacement in the region.
Congolese officials say the identity of the dead man who crossed the border was not known, but that no Congolese soldier on duty in the area had been reported missing.
Rwanda's President Paul Kagame agrees to assist Kenya's ex-leader Uhuru Kenyatta in urging M23 rebels to drop weapons and withdraw from eastern Democratic Republic of Congo.
Tens of thousands have fled fresh fighting that has caused a diplomatic rift between Congo and Rwanda, which Congo accuses of backing the Tutsi-led group.
The seven-nation East African Community asks warring parties in Democratic Republic of the Congo to cease fighting and says it will hold peace talks in Kenya's capital to prevent further clashes.
Military of Democratic Republic of Congo uses newly deployed jets to bombard M23 positions in the east of the African country, as some residents flee across the border, officials say.
Luanda is hosting foreign ministers of both African neighbours in bid to de-escalate tensions sparked by rise of M23 rebels menacing eastern DRC.
Kinshasa gives Vincent Karenga 48 hours to leave the country in retaliation for Kigali's alleged support for rebels fighting in east of Democratic Republic of Congo.
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