The chief mediator to the South Sudan deal told BBC that Salva Kiir’s refusal to sign the deal which would have ended the 18-month civil war was “mind-boggling”.
Seyoum Mesfin told the BBC that if Kiir refuses to sign in 15 days the regional body Igad will say “enough is enough”.
Fighting between the pro-government camp and the rebel forces resumed after Kiir’s refusal to approve the deal on Monday.
The BBC reported that nearly two million people are now homeless due to the conflict which broke out in 2013.
Kiir declined to sign the peace deal on Monday.
Riek Machar, leader of the rebels, told reporters “we do not have any reservations on the ceasefire. We have no reason to continue fighting. There is no reason why he [Kiir] requested for more time. He has got a good agreement.”
Seven ceasefires have been agreed upon and then broken since the beginning of the conflict in 2013.