Fighting has erupted at the South Sudan army barracks where the country's ongoing conflict began in mid-December.
Army officials say that clashes broke out around 9 a.m. Wednesday at the Giada Barracks on the outskirts of the capital, Juba.
The government says the fighting stemmed from a dispute over salary payments.
Gunfire could still be heard by late afternoon, Juba time, despite government statements that the situation was under control. Officials have declined to say whether anyone was wounded or killed in the fighting.
Giada is where members of the presidential guard clashed the night of Dec. 15. The fighting set off weeks of political and ethnic violence across South Sudan that left thousands dead and forced hundreds of thousands from their homes.
The government and rebel forces signed a cease-fire in Ethiopia in January but clashes have continued.
The unrest has led to a cut in South Sudan's oil production, which could affect the government's ability to pay soldiers.
Fears of renewed violence in the capital Wednesday prompted many shops to close early. Soldiers have been deployed along the city's main roads.