The United States saw another night of chaos, with protests against police brutality, with the president using a television address to threaten to send military personnel to recover order.
The police murder of George Floyd in Minneapolis on May 25 sparked furious protests across the country, which continued until Monday night.
The National Guard was deployed in several cities, but Donald Trump on Monday threatened to use the strength of the armed forces to suppress protests.
If governors across the country do not mobilize the National Guard in sufficient numbers to control the situation, Trump said the U.S. military would step in to "quickly resolve the problem for them," as he called violent acts carried out during the " "acts of domestic terror".
He asked mayors and governors to mobilize the National Guard in sufficient numbers to "dominate the streets".
His announcement came when police under federal command forced peaceful protesters outside the White House to return with tear gas so that Trump could walk to a nearby church and pose with a Bible.
One critic, New York Governor Andrew Cuomo, called it a photo.
Police and National Guard soldiers in Kentucky killed a man on Monday.
Police said they were returning fire after someone in a group shot them first.
Buffalo police said two people were shot at during Monday's protest. Meanwhile, a vehicle hit a line of police in the city, injuring at least two.
In Louisville, the police chief was fired after the murder of an owner of a popular barbecue restaurant, known for offering meals to police officers.
David McAtee died while police and National Guard soldiers imposed a curfew early Monday, amid waves of protests against a previous police shooting in Kentucky's largest city.
Police said they were responding to shots from a crowd.
George Floyd autopsy results released
George Floyd, a 46-year-old black American, died after a police officer kept his knee on his neck for several minutes, ignoring the handcuffed man's cries of anguish.
An autopsy commissioned for Floyd's family found that he died of asphyxiation due to compression on his neck and back, family lawyers said.
The new autopsy results found that the compression cut the blood from Floyd's brain, and that the weight on his back made it difficult to breathe, said lawyer Ben Crump, according to the Associated Press.
A police officer, Derek Chauvin, who was kneeling by Floyd's neck in widely shared online videos, was charged with murder and third-degree wrongful manslaughter.
Chauvin and three other officers were fired.