At least 600 people have been reportedly killed and nearly 1,000 injured in South Sudan in a massive cattle raid. The United Nations says members of the Murle ethnic group attacked three villages of the Lou Nuer community. It is the largest attack since the July 9th independence of South Sudan. As many as 250,000 people were forced to flee their homes. Doctors Without Boarders said its compound was looted and partially burned during the raid. At least one staff member of the organization was killed, and 17 other members of the group’s staff remain unaccounted for.