Police have arrested around 30 people during protests in New York City over a jury's decision to clear a white police officer who applied a chokehold to a black man which resulted in his death.
US attorney general Eric Holder said the Justice Department was launching a federal civil rights investigation into the death of Eric Garner, who was unarmed when police approached him.
It was the second grand jury in just over a week to decline to prosecute a white policeman in the death of an unarmed black man.
A woman who filmed Eric Garner being put into a choke hold by a New York officer tells ITV News he was treated 'like a dog on the street'
Activists see a straight line from Ferguson to New York City; the police shooting of Michael Brown to the police choking of Eric Garner.