The US Justice Department has opened a separate, federal, civil rights investigation into the death of Michael Brown, President Obama said. .
He said: "They are on the ground and along with the FBI they are devoting substantial resources to that investigation."
He added: "The US Attorney General will travel to meet with the FBI agents conducting the federal criminal investigation."
More top news
Mild in the south but colder in the north tonight and turning frosty and icy - before rain moves in.
ITV News' Tom Brady speaks to billionaire philanthropist Bill Gates about clean energy sources and a new $7bn green tech research fund.
A man accused of killing three people and wounding nine others in a shooting at an abortion clinic in Colorado has appeared in court.