Residents of the Missouri town of Ferguson ignored calls by the authorities to stay at home and took to the streets for a tenth night after the fatal shooting of black teenager Michael Brown.
Protesters want the white officer who shot the youngster arrested
Earlier in the day, in a separate incident, police shot dead a 23-year-old black man who they said had brandished a knife at officers.
This second shooting has added to public concerns about what many perceive as a pattern of excessive police force against minorities.
St Louis Police Dept chief Sam Dotson described what happen in the second shooting:
“As officers, the suspect turned toward the officers and started to walk towards them clutching his waistband. He then pulled out a knife and what was described as an overhead grip, and told the officers “shoot me now, kill me now.”
US Attorney General Eric Holder who has promised an fair and thorough investigation into Brown’s death is due to visit the area today.
Scores of people have been arrested in Ferguson, during nights which have seen volleys of tear gas fired at demonstrators and rocks and petrol bombs hurled at police.