Vice-President, wife placed under house arrest South Sudan’s vice president, Riek Machar, has been placed under house arrest, according to his party, escalating tensions that the United Nations has warned are pushing the world’s youngest country to the brink of civil war. The country’s defense minister and the chief of national security “forcefully entered” Mr. Machar’s residence late on Wednesday, disarmed his bodyguards and “delivered an arrest warrant to him under unclear charges,” according to Mr. Machar’s political party, the Sudan People’s Liberation Movement in Opposition. Mr. Machar’s wife, Angelina Teny, who...