A shaky ceasefire has held since late Monday following the fighting that raged for four days in Juba, leaving hundreds dead and forcing 40,000 to flee their homes.
The violence in the South Sudan capital echoed the fighting that triggered the civil war and marks a fresh blow to last year's deal to end the bitter conflict that began when President Salva Kiir accused ex-rebel and now Vice President Riek Machar of plotting a coup.
After meeting with the UN Secretary-General yesterday night leaders of the regional bloc IGAD supported Ban Ki-moon's calls for an arms embargo, targeted sanctions and a strengthened peacekeeping mission and called for "the deployment of a regional protection force to separate the warring parties".
AU Commission chair Nkosazana Dlamini-Zuma praised IGAD for acting "swiftly" in holding a meeting on South Sudan's crisis.
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"We shall not be indifferent and shall act in the belief that, when the power of love for fellow Africans overcomes the love of power there shall be peace within our lands," she said in an opening address.
The AU will also seek to hammer out a solution to the crisis engulfing Burundi where a spate of killings have rocked the country since President Pierre Nkurunziza's announced in April 2015 that he would seek a third term.
Also on the agenda is the ongoing fight against the Boko Haram jihadist group that has its roots in northern Nigeria but has carried out attacks across the Lake Chad region.
Recent violent incidents in the Central African Republic and the Democratic Republic of Congo are also expected to feature in the talks.
Several countries on the continent have indicated that they do not back any of the leading candidates for the job, arguing that they "lack stature".
Now all three of the leading candidates look like they may fail to get a majority of votes from the African Union's 54 members.