(VOVworld) - South Sudanese President Salva Kiir has ordered all government troops to cease fighting rebel forces as part of a peace agreement, his spokesman said, ahead of a full ceasefire on Saturday. Ateny Wek Ateny said Kiir has ordered the entire army "to stop shooting and remain in their barracks where they are, but they can shoot in self-defense once attacked." Both sides accused each other of launching attacks on Wednesday as Kiir signed a peace deal aimed at ending the 20-month long civil war in which tens of thousands of people have been killed. The United Nations Security Council on Friday said it is ready to impose sanctions on South Sudan's warring factions if they do not fully implement a new peace agreement. In a presidential statement Friday, the 15-member council called for the sides to adhere to the cease-fire immediately.