At least 58 people were killed Thursday when a group of armed civilians pretending to be peaceful protesters delivering a petition to the United Nations in South Sudan  forced their way into a U.N. base sheltering some 5,000 civilians and opened fire, the world body said. Among those killed in the attack on the base in Bor in northern Jonglei state were 46 internally displaced persons and 12 attackers, according to the U.N. Mission in South Sudan. No U.N. staff were killed, they said.  Another U.N. spokesperson said about 100 had been injured. Two U.N. peacekeepers were wounded repelling the armed intruders, the U.N. said. The United Nations has reinforced security at Bor, and South Sudan’s government has sent troops to secure the base. More than 1 million people have fled their homes since  fighting erupted in the world’s youngest country in December between troops backing President Salva Kiir and soldiers loyal to his sacked Vice President […]