The UN chief is warning that violence is spreading in South Sudan as fighting between rival army factions continues unabated. Ban Ki-moon says he\'s deeply concerned about the situation in the country and that the crisis should be dealt with through dialog. Meanwhile, a UN official says at least 19 people are killed in fresh clashes in Bor, the capital of Jonglei state. The army now says it has lost control of the city. Tensions are also rising in other part of the country. South Sudan has been witnessing deadly violence after President Salva Kiir accused former vice president Riek Machar of trying to launch a coup. Machar who was sacked in July has denied the accusations. Based on U-N figures, up to 500 people have been killed and 800 others wounded since the violence broke out on Sunday. Show Less >>