"In the last 24 hours, 67 people have been injured in or around the protection of civilians sites, eight of which have died," the press release reads.
An armed ethnic conflict erupted in South Sudan in December 2013, 1.5 years after the nation gained independence from Sudan, when President Salva Kiir accused First Vice President Riek Machar of preparing a military coup. The conflict forced more than a million people to flee their homes.
In August 2015, Kiir and Machar signed a peace deal that envisaged the formation of the Transitional Government of National Unity.
Renewed fighting broke out last week and over 300 people have already lost their lives in the clashes, according to media reports.