The United Nations on Tuesday denounced the shelling of a displacement camp in North Darfur by Sudan's paramilitary Rapid Support Forces (RSF), which killed at least six people.
The famine-stricken Zamzam camp, just south of state capital El-Fasher, came under intense rocket and artillery bombardment by the RSF on Sunday.
"The United Nations and humanitarian partners in Sudan strongly condemn these acts of violence against innocent civilians," the UN resident coordinator for Sudan, Clementine Nkweta-Salami, said in a statement.
She added: "I am deeply concerned by reports of the indiscriminate shelling of Zamzam camp, health clinics and shelters of displaced people. Their protection is paramount."
Since April last year, a war between the regular army and the RSF has killed tens of thousands, displaced more than 11 million and created what the UN has called the worst humanitarian crisis in recent memory.
El-Fasher has been besieged by paramilitaries for months, paralyzing aid operations and plunging the Zamzam camp, which is home to at least half a million people, into famine.
According to the UN, which managed to deliver its first aid convoy to Zamzam in months in November, families have been reduced to eating peanut shells to survive as children die of malnutrition.
"It is now 232 days since the siege of El-Fasher began, which has resulted in unacceptable levels of human suffering," Nkweta-Salami said.
Both sides of the conflict face accusations of war crimes, including targeting civilians, shelling residential areas and blocking or looting aid.
In recent weeks, the RSF has tightened its grip on El-Fasher, launching attacks on multiple fronts against Sudan's military and allied armed groups.