UNITED NATIONS (AP) — An attack on a U.N. peacekeeping base in South Sudan where some 5,000 members of an ethnic minority had sought shelter killed 58 people and injured about 100 others, a U.N. official said Friday.

An angry mob of youths attacked the U.N. peacekeeping mission’s camp in Bor in Jonglei state on Thursday where ethnic Nuers fled after fighting broke out in the country in mid-December.