A search and rescue operation is ongoing after Al-Shabab stormed an African Union base on Friday.
The Somali militants detonated a suicide car bomb at the military base near the Kenyan border.
More than 400 people have been killed in conflict in Burundi since April 2015.
A report from the group cited the discovery of mass graves, among other things.
Human Rights Watch called on Sudan's government to disband the Rapid Support Forces.
At 91 years old, the President's 34-year reign is coming to an end and national talk has turned to who will succeed him.
Despite recent defeats, experts have warned that the terror group still pose a significant threat.
Neighboring countries plagued by cross border attacks are weighing in against the insurgent group.
The Islamist militant group has about 4,000-6,000 "hardcore" fighters, U.S. intelligence officials said on Friday.
French reconnaissance flights are beingconducted along Nigerien and Chadian borders as part of wider Sahel strategy.
Any such force would represent the most robust international response yet to the militants who have killed thousands over the last year.
A spokesman of the militant group said it "targeted the enemies at a time they were celebrating Christmas."
The request comes weeks after allegations of a mass rape by Sudanese government forces.
Obama asked for more commitments to contain the disease, which has killed nearly 3,000, before it threatens global and regional security