More than 100 people are now said to have died in fighting in south Sudan after rebels attacked the army, officials say.
Earlier reports said this week's fighting had killed 16 people.
Some 39 of those killed were civilians, a south Sudan army spokesman said.
The clashes between fighters loyal to George Athor and south Sudan's army come as the region prepare for independence from the north following last month's referendum.
Some 99% of people voted to secede from the north, according to official results announced this week.
The UN refugee agency says it expects some 800,000 people to move from north to south Sudan this year.
The UNHCR said this would put pressure on the already fragile situation in the south, which is insecure and lacks basic services.
Mr Athor took up arms last year, alleging fraud in state elections, but signed a ceasefire last month just before the historic vote. BBC News
