Rwandan President Paul Kagame said on Friday he was unsure whether a U.S.-brokered peace deal would hold with neighbouring Democratic Republic of Congo.

While leaders hail a recent peace deal between Rwanda and the DR Congo as a diplomatic breakthrough, observers say deep-rooted tensions and unresolved grievances remain major threats.The Rwandan and Congolese governments have lauded the recently signed peace agreement as a historic milestone to end fighting in the eastern Democratic Republic of Congo.

The Democratic Republic of Congo and Rwanda have signed a peace deal facilitated by the U.S. to help end the decades-long fighting in eastern Congo.