Riek Machar

UN representatives reported heavy exchanges of gunfire near their headquarters in the suburb of Jebel.

The clashes follow days of fighting between supporters of President Salva Kiir and Vice-President Riek Machar.

The violence has raised fears of renewed instability, with a 2015 peace deal failing to quell unrest.

Heavy gunfire was reported on Sunday in the Gudele and Jebel suburbs of Juba, near a military barracks occupied by troops loyal to Mr Machar.

Kiir signed the agreement in Juba, South Sudan's capital, in a ceremony witnessed by regional leaders. Kiir said he was signing the document despite having serious reservations. He signed the same agreement endorsed by rebel leader Riek Machar, said Kiir's spokesman Ateny Wek Ateny.

Kiir said he needs 15 days before he will sign the agreement with rebel leader Riek Machar, according to mediators in the Ethiopian capital of Addis Ababa. Machar signed the accord before Kiir refused.

Some South Sudanese women who participated in the negotiations were seen crying after Kiir said he would not sign. Others banged tables to express their disappointment.