A Rwandan army spokesman in Kigali also categorically denied any military presence in DRC Friday.
The UN Office for the Coordination of Humanitarian Affairs said Friday that the past month of clashes "have drastically reduced access between Goma, Masisi and Rutshury territories, making it virtually impossible for humanitarians to access affected populations and bring assistance."
The UN World Food Progamme has cancelled food relief deliveries for 18,800 people in need, while overall the number of displaced villagers is estimated at 370,000, notably in Nkunda's Masisi fief and Rutshuru further north.
Since a 1998-2003 rebel war in the DRC, when Rwanda was among more than half a dozen nations to send troops to fight on rival sides, Kinshasa has embarked on army reforms and wants to incorporate all Congolese fighters.
But Nkunda presents himself as a rampart against armed Rwandan Hutus who fled into the DRC after the genocide. Regional observers and diplomats say the Nkunda problem cannot be solved while those Hutus are present.
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