The state of Missouri is bracing for more violent protests tonight after what police described as its "worst" riots over the death of unarmed teenager Michael Brown.
Brown's family has called for calm following a grand jury decision not to bring criminal proceedings against Darren Wilson, the officer who shot dead their son on August 9.
ITV News Correspondent Robert Moore reports from the city of Ferguson:
The mayor of St Louis has warned protesters in Ferguson that violence "is as antithetical to change as racism".
Mayor Francis Slay called last night's protests "criminal" and warned on his official Facebook page that they would not be tolerated.
"It will not change minds and real change will not happen unless everyone wants it and works together," he said.
"I think those who want the biggest and most immediate changes know that what happened in Ferguson last night was a setback in building that support and goodwill. But, we can, and we must, overcome it."
The family of Michael Brown, the unarmed teenager shot dead by a white police officer, have chosen not to address a press conference in the hope his words will not flame violence over his son's death.
Benjamin Crump, one of the Brown's family's lawyers, said they had appealed for calm and rejected any violence done in their son's name.
Some 61 people were arrested last night in the Missouri city of Ferguson after a grand jury announced officer Darren Wilson would not be indicted over's Brown's death.
Civil rights activist Rev Al Sharpton has said the unarmed black teenager shot dead by a white police officer will be remembered "for new legislation" that will be made following his death.
"Michael Brown will not be remembered for the ashes from buildings burned in Ferguson," Sharpton said.
"He'll be remembered for new legislation and upholding the law that protects citizens in the country."
Civil rights activist Rev Al Sharpton has said Michael Brown's family "are going to pursue justice" after the grand jury decision not to indict officer who shot dead the teen.
"This is not just a Ferguson problem," Sharpton told reporters. "There's a grand jury about a week or two away from deciding a case in New York, there's a 12 year old that was just killed by police in Cleveland."
"This is a problem all over the country," he said. "We will continue to fight for a new level of accountability of policing in this country."
Civil rights activist Rev Al Sharpton has criticised the St Louis County prosecutor for accusing Michael Brown of crimes and discrediting witnesses while allowing officer Darren Wilson to go free.
"Let us be clear, you have broken our hearts, but you have not broken our backs," Sharpton said.
The Brown family's lawyer has said the legacy of Michael Brown Jr "should be that we strive to make a difference."
The lawyer of Michael Brown's family said a first year law student "could have done a better job" than the prosecutor's office did in this case.
"A first year law student would have did a better job of cross-examining the killer of an unarmed person than the prosecutor's office did," Attorney Benjamin Crump said.
The lawyer for Michael Brown's family has "strenuously objected" to the prosecutor and the process after a grand jury decided not to indict the police officer who shot dead their unarmed teenage son.
Attorney Benjamin Crump told reporters the process was "completely unfair", saying, "We object publicly and as loudly as we can on behalf of Michael Brown Jr's family that this process is broken."
"This process should be indicted," Crump added.