South Sudan's President Salva Kiir, right, and Vice President Riek Machar, left, attend a Holy Mass led by Pope Francis at the John Garang Mausoleum in Juba, South Sudan Sunday, Feb. 5, 2023. (AP Photo/Ben Curtis, File)
JUBA, South Sudan (AP) — South Sudan’s main opposition party said Thursday a peace agreement that ended a five-year civil war has collapsed, following the arrest of its leader Riek Machar a day earlier.