| This Facebook image of Alton Sterling has been widely circulated on US media |
The US Department of Justice has launched a civil rights investigation into a police shooting of a black man in Louisiana.
| Alton Sterling's 15-year-old son, Cameron Sterling, breaks down during a news conference about his father's death |
"Like you, there is a lot that we do not understand. And at this point, like you, I am demanding answers," the chief said. The shooting on Tuesday sparked protests from about 200 people who gathered at the scene where Mr Sterling was shot, blocking roads and chanting: "Black lives matter".
The governor called for unity and urged protesters to remain calm as authorities conduct an investigation into the shooting. "I have full confidence that this matter will be investigated thoroughly, impartially and professionally, and I will demand that's the way it's conducted." Governor Bel Edwards said.