Kiir said he was signing the document despite having serious reservations. He signed the same agreement endorsed last week in Ethiopia by rebel leader Riek Machar, said Kiir's spokesman Ateny Wek Ateny.
Machar, the former deputy president, signed the agreement last week in Ethiopia but Kiir refused, saying he needed more time, drawing condemnation from diplomats who want a quick agreement to end the violence in the world's newest country.

Signing the agreement today, Kiir said he felt the peace deal had been imposed on him and said the agreement is flawed. He also said that some aspects of the deal "are not in the interest of just and lasting peace ... We had only one of the two options, option of an imposed peace or the option of a continued war ... We are here talking about peace."

The agreement binds Kiir into a power sharing arrangement with Machar, a political rival whose dismissal in July 2013 sparked a political crisis that later boiled over into a violent rebellion. The fighting has often been along ethnic lines, pitting Kiir's ethnic Dinka people against Machar's Nuer.
Thousands of South Sudanese have been killed in the fighting and more than 1.6 million people have been displaced. Atrocities have occurred in which young girls have been raped and burned alive, said the UN.

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