Fighting broke out in a military barracks in war-torn South Sudan's capital Juba on Wednesday, witnesses said, although the cause of the clashes were not immediately clear.
An AFP reporter said the sound of heavy gunfire was heard coming from Giyada barracks near Juba University. There were conflicting reports of an uprising over unpaid salaries or possible defections from the government.
The conflict in South Sudan started in the capital Juba nearly three months ago amid tensions within the ruling party of President Salva Kiir and former vice president Riek Machar, but quickly spread across the country.
The unrest in South Sudan, the world's newest nation, has left thousands dead and has displaced close to 900,000 people, including tens of thousands who have crammed into UN bases in fear of ethnic attacks.