-South Sudanese rebels separated terrified residents by ethnicity before killing hundreds.
-"We believe that at least 400 people were killed in Bentiu in the past week," said Toby Lanzer, top United Nations official in #SouthSudan
-In one mosque alone, more than 200 civilians were reportedly killed
-"Images and accounts of the attacks shock the conscience," the White House statement
-Before the attacks, some rebel commanders broadcast messages on local radio warning certain groups to leave town.