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South Sudan's warring leaders expected to sign compromise peace agreement on deadline

  • FILE - In this Monday, April 26, 2010 file photo, then Vice President Riek Machar, left, and President of South Sudan Salva Kiir, centre, arrive for a press conference in Juba, South Sudan. Mediators say President Salva Kiir of South Sudan and rebel leader Riek Machar are expected to sign a peace agreement in Addis Ababa, Ethiopia on Monday, Aug. 17, 2015, with the U.S. urging the warring factions to reach a peace agreement by that date or face sanctions. (AP Photo/Pete Muller, File)

    FILE - In this Monday, April 26, 2010 file photo, then Vice President Riek Machar, left, and President of South Sudan Salva Kiir, centre, arrive for a press conference in Juba, South Sudan. Mediators say President Salva Kiir of South Sudan and rebel leader Riek Machar are expected to sign a peace agreement in Addis Ababa, Ethiopia on Monday, Aug. 17, 2015, with the U.S. urging the warring factions to reach a peace agreement by that date or face sanctions. (AP Photo/Pete Muller, File)  (The Associated Press)

  • South Sudan's rebel leader Riek Machar, center, shakes hands with South Sudan's President Salva Kiir, center-right wearing a black hat, after lengthy peace negotiations in Addis Ababa, Ethiopia Monday, Aug. 17, 2015. South Sudan's President Salva Kiir refused to sign a peace agreement Monday with rebel forces, saying he needs 15 days before he will sign, although rebel leader Riek Machar had signed the accord before Kiir refused. (AP Photo/Mulugeta Ayene)

    South Sudan's rebel leader Riek Machar, center, shakes hands with South Sudan's President Salva Kiir, center-right wearing a black hat, after lengthy peace negotiations in Addis Ababa, Ethiopia Monday, Aug. 17, 2015. South Sudan's President Salva Kiir refused to sign a peace agreement Monday with rebel forces, saying he needs 15 days before he will sign, although rebel leader Riek Machar had signed the accord before Kiir refused. (AP Photo/Mulugeta Ayene)  (The Associated Press)

  • South Sudan's rebel leader Riek Machar, second left, looks across after shaking hands with South Sudan's President Salva Kiir, center-right wearing a black hat, after lengthy peace negotiations in Addis Ababa, Ethiopia Monday, Aug. 17, 2015. South Sudan's President Salva Kiir refused to sign a peace agreement Monday with rebel forces, saying he needs 15 days before he will sign, although rebel leader Riek Machar had signed the accord before Kiir refused. (AP Photo/Mulugeta Ayene)

    South Sudan's rebel leader Riek Machar, second left, looks across after shaking hands with South Sudan's President Salva Kiir, center-right wearing a black hat, after lengthy peace negotiations in Addis Ababa, Ethiopia Monday, Aug. 17, 2015. South Sudan's President Salva Kiir refused to sign a peace agreement Monday with rebel forces, saying he needs 15 days before he will sign, although rebel leader Riek Machar had signed the accord before Kiir refused. (AP Photo/Mulugeta Ayene)  (The Associated Press)

Mediators say President Salva Kiir of South Sudan and his political rival are expected to sign a peace agreement in Ethiopia on Monday.

Representatives of Kiir and rebel leader Riek Machar have been negotiating in the Ethiopian capital of Addis Ababa since Aug. 6. The U.S. had urged the warring factions to reach a peace agreement by Aug. 17 or face sanctions.

Haile Michael, a spokesman for a regional bloc mediating the talks, said Kiir and Machar will sign what he called a "compromise document" on Monday.

Previous attempts at a negotiated settlement have failed. At stake were issues such as how to share power and the composition of a transitional government of national unity.

Many parts of South Sudan have seen war since December 2013.