Authorities in Ferguson used tear gas to disperse protesters on Monday night as demonstrations continued in the St. Louis suburb following the shooting of unarmed 18-year-old Michael Brown.
Some protesters had to be treated for smoke inhalation amid heightened racial tensions between the predominantly black community and the mostly white Ferguson Police Department.
Brown was shot at least six times on 9 August including twice in the head, according to pathologists and the family's attorneys.
His death sparked rancorous protests in the St. Louis suburb, so much so that Governor Jay Nixon ordered a midnight curfew over the weekend, and the National Guard were brought in to help keep the peace.
In Washington, US President Barack Obama said in a news conference that Attorney General Eric Holder would arrive in Ferguson on Wednesday to meet with FBI (Federal Bureau of Investigation) and other officials carrying out an independent federal investigation into Brown's death.