Gunfire broke out in the base in Malakal in the northeast on Wednesday night, with reports of gunfire continuing on this morning.
"They killed seven people and injured 32 people, including a young boy whose father was also killed," said resident Jacob Nhial, speaking from inside the UN base.
Rebels also reported the shooting, but the numbers killed could not be independently confirmed.
Over 47,500 people live inside the Malakal base, among almost 200,000 civilians who have sought shelter behind the razor wire fences of eight UN bases across the country since civil war began in late 2013.
It was not immediately clear who the gunmen were. Malakal is in government control but frontlines with rebel areas are close by.
In the past, the UN has said attacks on its bases in South Sudan may constitute a war crime.
Veteran opposition politician Lam Akol, who comes from Malakal in the northeastern Upper Nile state, condemned what he called the "callous and cowardly attack on innocent unarmed civilians."
UN Mission in South Sudan (UNMISS) spokeswoman Ariane Quentier said there had been "an incident" but was unable to confirm details.
In April 2014, gunmen killed at least 48 civilians when they opened fire on terrified civilians inside a UN base in the town of Bor. At least 10 attackers were also killed when UN troops fought back.
Tens of thousands of people have been killed and over two million forced from their homes since the war began, pushing the world's youngest nation to the brink of famine.
Earlier this month President Salva Kiir named his arch-rival and exiled rebel chief Riek Machar as vice-president, as part of a repeatedly broken August peace deal.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
