Rebel forces have clashed with government troops in South Sudan, only days after a ceasefire was agreed to end fighting.
Troops clashed in Upper Nile, Jonglei and Unity states, with both sides blaming each other for restarting hostilities.
A rebel spokesperson said that government soldiers attacked their positions, including oil fields under rebel control, however the government accused rebels of launching attacks first.
The ceasefire came about after the regional body Intergovernmental Authority on Development (Igad), made up of eight east African states, on Friday threatened to impose sanctions on both sides, including travel bans and an arms embargo, if fighting did not end within 15 days.
After talks last week, brokered by Igad, between South Sudan's President Salva Kiir and rebel leader Riek Machar in Addis Ababa, the two leaders agreed to an "unconditional, complete and immediate end to all hostilities".