A video has emerged appearing to show two white police officers holding down and shooting dead a black man during an incident in the US state of Louisiana.
The confrontation took place in the state capital, Baton Rouge, on Tuesday after reports of a man threatening people with a gun outside a shop.
A post-mortem examination showed the victim, Alton Sterling, 37, died of gunshot wounds to the chest and back.
The video shows two officers wrestling a man in a red shirt to the floor.
The man struggles and one of the officers pins his arm to the floor with his knee and then appears to pull out his gun and point it at the man.
A voice is heard shouting: “He’s got a gun. Gun.” Then shots ring out and the camera moves away.