The city's mayor Bill de Blasio has announced that a curfew that was due to last from 23:00 on Monday to 05:00 on Tuesday will now resume at 20:00 on Tuesday.

Stores were looted in the city on Monday evening, including in Manhattan's Fifth Avenue.

"We can make our points without burning the very neighborhoods we live in," says the US golfer on Twitter.

Woods also says "I have always had the utmost respect for our law enforcement...this shocking tragedy clearly crossed that line".

Night has fallen in Washington DC and a curfew has come into effect - but protesters are still on the streets.

Earlier, videos showed helicopters flying extremely low over the remaining protesters.

According to the New York Times, this video features a US Army Blackhawk helicopter using a "show of force" manoeuvre on protesters.

This tactic is "often conducted by low-flying jets in combat zones to scare away insurgents", it adds.

Law enforcement dispersed a peaceful protest with tear gas and rubber bullets at a park next to the White House, as the president vowed to deploy troops, if necessary, to "dominate the streets".

Moments later Donald Trump walked out of the executive mansion to a nearby historic church, where he held up a Bible.

As we reported earlier, President Trump addressed reporters in Washington DC and promised a military response to the "rioting and looting" seen in the US.

Here are some of his quotes:

• "I am dispatching thousands and thousands of heavily armed soldiers, military personnel and law enforcement officers to stop the rioting, looting, vandalism, assaults and the wanton destruction of property."

• "If a city or state refuses to take the actions that are necessary to defend the life and property of their residents, then I will deploy the United States military and quickly solve the problem for them."

• "We cannot allow the righteous cries of peaceful protesters to be drowned out by an angry mob."

Protesters marching in Dallas, Texas, where there is a 19:00 curfew in place:

Crowds in Portland, Oregon:

And a heavy police presence in Phoenix, Arizona.

Arguably the most famous shopping street in New York, Manhattan's Fifth Avenue has this evening seen looting.

One video showed a Nike store , externalwith its windows smashed, with clothes all over the floor in disarray.

One journalist at the scene said there was "uncontrollable" amounts of looting going on, adding that stores were being emptied by "hundreds of people".

Rachel Olding added that cops were running into department store Macy's as it was being looted - but that there was "absolutely no concerns about cops being here".

Joe Biden has continued his criticism of President Trump on Twitter, accusing him of "using the American military against the American people".

Mr Trump earlier said his "first and highest duty" is to "defend our great country and the American people".

Democratic presidential candidate Joe Biden has vowed to "deal with institutional racism", during an in-person discussion with black leaders in Delaware.

Without going into specific details, he also promised to set up a police oversight body within his first 100 days in office - if elected in November, said a report by the Associated Press. , external

He also appeared to take a swipe at President Trump, saying: "Hate just hides. It doesn't go away, and when you have somebody in power who breathes oxygen into the hate under the rocks, it comes out from under the rocks."

Image source, Getty Images

Earlier on Monday, Trump berated governors during a phone call for their response to the protests, warning "you’re going to look like a bunch of jerks".

"You have to dominate, if you don’t dominate you’re wasting your time. They’re going to run over you, you’re going to look like a bunch of jerks. You have to dominate," he said.

He also said he was putting the highest-ranking military officer in the US Armed Forces "in charge".

And this video, posted to Twitter by a verified journalist, appears to show Gen Mark Milley, chairman of the Joint Chiefs of Staff, walking the streets of Washington DC tonight.

Here's Gen Milley pictured outside the White House with President Trump earlier on Monday by a Getty photojournalist:

Image source, Getty Images

This was the moment an Australian camera crew was caught up in a charge by law enforcement outside the White House in Washington DC.

The Department of Justice Spokesperson Kerri Kupec tweets:

The Mayor of Washington DC Muriel Bowser has condemned federal police for using munitions on peaceful protesters, a "full 25 minutes" before a curfew was set to begin.

In a tweet, she said their actions would "make the job of DC Police Dept officers more difficult".

Bowser, who had earlier ordered a 19:00-06:00 curfew, also called on DC residents to "go home".

The curfew was imposed after a night of violent protests in Washington.

Image source, Getty Images

Moments ago, we saw President Trump standing outside a church holding up a Bible.

But just before this, armed soldiers were seen chasing out peaceful protesters - clearing the way for Trump to walk towards the church.

The church in question is the historic St John's Episcopal Church - which has been attended by every US president since James Madison in 1816. It was lightly damaged in a fire set by rioters the previous evening.

But the region's bishop - has accused Trump of using the church as a "prop".

The Right Rev Mariann Budde told the Washington Post: "I am outraged... [I] was not given even a courtesy call that they would be clearing with tear gas so they could use one of our churches as a prop, holding a Bible... one that declares that God is love when everything [Trump] has said and done is to enflame violence.

"I don't want President Trump speaking for St John's."

Amid chaotic and violent scenes, there are glimmers of hope, unifying gestures and stirring displays of solidarity.

Anthony Zurcher
BBC North America reporter

Throughout Monday, pressure grew on Donald Trump to take action to address the rising unrest in major cities across the US. As the sun set in Washington, DC, in a hastily arranged Rose Garden address, the president outlined what that action would be.

Governors were warned that if they did not effectively secure property and safety on the streets, the president would cite a centuries-old law to dispatch the US Army on American soil. And in the District of Columbia, which is under federal authority, the president had already ordered the military to deploy in force.

Moments before the president spoke, promising he was on the side of peaceful protesters, those armed soldiers cleared out peaceful protesters from Lafayette Square, across the street from the White House.

It set the stage for the president to walk with his senior staff across the park to St John’s Church, which was lightly damaged in a fire set by rioters the previous evening - an important symbolic gesture or an unnecessary photo opportunity, depending on one’s perspective.

Posing in front of the building with a Bible, he promised that America was "coming back strong" and "it won't take long".

There was no talk of police reforms or the root causes of the protests that began last week at any point in the evening’s proceedings. Instead, he said he was the "president of law and order" - a sign, it seems, that his solution to the ongoing crisis will be an escalation of force.

As night falls across the US, the consequences from this latest move will come into view.

Illinois Governor JB Pritzker, a Democrat, just spoke on CNN, where he said he watched in disbelief as protesters outside the White House were pushed away by riot police.

"This is not the way we behave in the United Stats. Our law enforcement are out there on the streets trying to protect people. We are not - at least here in Chicago - in the business of putting down peaceful protests."

He says during Trump's call with governors earlier today, the president said "crazy things".

"He talked about dominating the streets in all our cities," he continued, denouncing the president as a racist.

Pritzker said the National Guard had already been deployed in the state, but "we won't request military assistance in the state of Illinois". He said Trump's threat to send the military into states would be "illegal".

Standing outside the church, Trump held up a Bible, flanked by aides, and said: “We have the greatest country in the world. I'm going to keep it nice and safe.”

As he spoke, he was flanked by White House aides who were not wearing masks or social distancing.

Pictures show that only his daughter Ivanka Trump is wearing a mask among the group.

Our North America editor was listening to the president's remarks...

Our colleague at CBS News describes a chaotic scene as the White House press corps was unexpectedly jostled out of the executive mansion for the president's excursion.

Hundreds of additional National Guard troops from five states are to be deployed to Washington DC to help authorities deal with civil unrest.

Around 800 more National Guard members have been requested to ensure there are "sufficient forces for protecting the city and maintaining peace this evening", a defence official said.

The official said some of the forces may be equipped with lethal weapons "should the president decide to arm them".

The forces would be tasked with safeguarding "monuments, the White House, property and generally helping the DC police and DC law enforcement respond to any threats on life", the official added.

Washington's entire National Guard, around 1,200 personnel, have already been activated.