If they do n't , the leaders of the Intergovernmental Authority on Development ( IGAD ) warned they 'll `` take action '' to stop the conflict that the United Nations says has killed more than 1,000 and forced some 121,000 from their homes . NEW : 72 of 5,500 new peacekeepers have arrived in South Sudan , the Group says . South Sudanese leaders tell South Sudan 's government , rebels to stop fighting or else . Group says it will take unspecified action if fighting does n't stop within Friday . South Sudan 's government says it 's ready to adopt a cease-fire .
NEW : 72 of 5,500 new peacekeepers have arrived in South Sudan , the Group says . South Sudanese leaders tell South Sudan 's government , rebels to stop fighting or else . Group says it will take unspecified action if fighting does n't stop within Friday . South Sudan 's government says it 's ready to adopt a cease-fire .