At least 20 people have been killed in clashes inside a UN camp for displaced people in South Sudan, the Organization’s Office for the Coordination of Humanitarian Affairs (OCHA) has announced.

The atmosphere has been tense since last week, when women from different ethnic groups fought at a water source in the Malakal camp.

Clashes escalated on Thursday when a 14-year-old Siluk boy was stabbed and killed inside the camp, which is about 520 kilometers from South Sudan’s capital, Juba.

According to Doctors Without Borders, at least 20 people were killed and another 50 injured.

The camp is home to at least 50,000 people. It was established when people displaced by South Sudan’s civil war began arriving in the region in 2013. In recent weeks, some 3,000 people have arrived there who fled neighboring Sudan to escape the conflict in their country.

The peace agreement signed in 2018 by the opposing sides in South Sudan’s civil war has helped to significantly reduce violence. However, riots often flare up between rival ethnic groups.

Conflicts are common in areas where different tribes claim their rights to water, farmland, pastures and other resources. Last December 166 people, mostly civilians, were killed and at least 20,000 displaced in this area.

Today there is relative calm in the camp, but the UN Mission in South Sudan (UNMISS) has strengthened security measures.