Gunmen in South Sudan opened fire on civilians sheltering inside a United Nations base, residents said Thursday, the latest atrocity in the war-torn nation.
Gunfire broke out in the base in Malakal in the northeast on Wednesday night, with reports of gunfire continuing on Thursday 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.
"They used Kalashnikovs and machine guns... the situation is still tense, people are hiding," Mr Nhial added.
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.
The UN mission has more than 12,000 peacekeepers, with half them deployed solely to protect the civilians in their bases.
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.
Mr Machar has yet to return to take up the post and fighting continues, with the conflict now involving multiple militia forces driven by local agendas or revenge, who pay little heed to paper peace deals.