The fatal shooting of a black man running from a white police officer has inflamed debate in the United States over police use of force.

The mayor and police chief of North Charleston, South Carolina's third-largest city, said they were sickened by what a bystander's video revealed.

The officer, who has been charged with murder, has been fired. But this did little to quell the outrage of a crowd at North Charleston's City Hall, where officials were shouted down by protesters calling for justice.