UN Secretary-General Ban Ki-moon condemns an attack against a U.N. protection-of-civilians site in South Sudan amid renewed violence, his office said Thursday. According to the U.N. mission in South Sudan (UNMISS), the attack – which occurred Wednesday against the U.N. compound outside the city of Malakal – resulted in the shooting deaths of one internally displaced person (IDP) and the injury of six others. UNMISS said that three members of forces belonging to either the Sudan People's Liberation Army in Opposition or the allied militia led by General Johnson Olony opened fire on IDPs at the recently opened protection-of-civilians site. In a statement from his office, Ban called on former Vice President Riek Machar and Olony "to conduct an immediate investigation into this incident and hold to account those responsible." "[The secretary-general] reminds the parties that they must respect the inviolability of UNMISS premises, including protection of civilian sites, which are now host to more than 140,000 IDPs," the statement said.