Rwandan military officials are being accused of fomenting an army mutiny in the Democratic Republic of Congo.
Human Rights Watch, the international rights group, says Rwandan officers have supplied a renegade general, Bosco Ntaganda with troops, weapons and ammunition.
Witnesses say that civilians in Rwanda’s border regions of Musanze and Rubavu have been recruited to fight for the rebels.
The Rwandan government has denied any involvement in the rebellion that has further destabilised a region long in turmoil.
Last week, Louise Mushikiwabo, Rwanda's foreign minister, dismissed claims that Rwandans recruited and trained for the Rwandan army have been transferred to eastern Congo to fight for the rebels, as "categorically false and dangerous."
Catherine Soi reports from Nairobi.