JUBA, Sudan — A security official in Southern Sudan says another bout of violence during this week’s independence referendum has killed 10 people.

Tens of thousands of people are pouring back into Southern Sudan in anticipation the region will choose independence in a referendum next month. The Jan. 9 vote could split Africa’s largest country and create the world’s newest nation.

The President of South Sudan called for more transparency in the collection of taxes and instructed that public services employees who recieve double salaries fraudlently to be punished. Sudan’s First Vice President Salva Kiir was speaking at the...