Military forces belonging to the Democratic Republic of Congo have reinforced front-line positions near Goma after their weekend push against M23 rebels.
Congolese officials have paraded several prisoners captured during the fighting.
Three of them were said to be from neighbouring Rwanda which has been accused of backing the rebels.
The M23 rebels, named after a March 23, 2009, peace deal that ended four years of rebellion, took up arms last year accusing the DRC government of failing to honour the agreement which included integrating them into the army.
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