In North Kivu, a second day of clashes raged near the banks of Lake Edward, which straddles the border between DRC and Uganda, said Muhindo Tafuteni, a local civil society activist.
In South Kivu, fighting took place in several towns north of the provincial capital Bukavu, which M23 captured in February, residents said.
### **R****EGIONAL DIPLOMACY**
Leaders from the main Southern and Eastern Africa political blocs had met on Monday to advance a plan aimed at securing a ceasefire in a conflict rooted in the long fallout from the 1994 genocide in Rwanda and competition for control of mineral riches.
In a statement afterwards, they said they had appointed five former heads of state to facilitate the peace process.
The appointees are Nigeria's Olusegun Obasanjo, South Africa's Kgalema Motlanthe, Ethiopia's Sahle-Work Zewde, Kenya's Uhuru Kenyatta and Central African Republic's Catherine Samba Panza.
DRC's presidency said the new panel would name a mediator to replace Angolan President Joao Lourenco, who withdrew from the role on Monday following years of efforts to ease tensions between Rwanda and DRC.
Rwanda's government, which has been sanctioned by several Western countries for supporting M23 with arms and troops, said the summit was "fruitful".