A person was shot dead in Portland following clashes between Black Lives Matter protesters and supporters of US President Donald Trump, according to police.
The Oregon city has been an epicentre of BLM protests since the police killing of unarmed black man George Floyd in Minnesota in late May.
According to local media, a "caravan of hundreds of cars" of Trump supporters also converged there yesterday.
Portland Police tweeted a political rally was "caravanning throughout downtown Portland".
It added: "There have been some instances of violence between demonstrators and counterdemonstrators. Officers have intervened and in some cases made arrests."
OregonLive reported "clashes" and "tense moments" between the groups, although police did not say whether the shooting was related to the demonstrations.
The shooting occurred at around 8.45pm, police said later in a statement, adding a homicide investigation was under way.
"Portland Police officers heard sounds of gunfire from the area of Southeast 3rd Avenue and Southwest Alder Street," the statement said.
"They responded and located a victim with a gunshot wound to the chest."
Mr Trump will travel next week to the Midwestern city of Kenosha where African American Jacob Blake was shot multiple times in the back by a white policeman, sparking a nationwide wave of protest.
He will meet police in Kenosha, Wisconsin on Tuesday and "survey damage from recent riots" triggered by the shooting last weekend, White House spokesman Judd Deere has said.
Mr Blake was shot at least half a dozen times in front of his small children as he tried to get into a car, in an incident that has prompted an outpouring of anger over yet another shooting of a black man by police.
Mr Deere did not say if the US President would meet the family of Mr Blake, 29, who was left paralysed from the waist down.
Protesters have taken to the streets in major cities nationwide this summer over the deaths of black people at the hands of police. It is the most widespread civil unrest in the United States for decades.
Mr Trump has characterised the mostly peaceful activists as rioters as he pushes a law and order message while fighting an uphill battle for re-election in November.
Kenosha, about an hour's drive from Chicago, saw three nights of violence after the Blake shooting as protesters set fire to buildings and cars.
Major US sports leagues, including the NBA, were forced to suspend play as African American and other players outraged by the shooting joined the latest national wave of anger over racial injustice and police misconduct.
On Friday, tens of thousands of protesters thronged the US capital for a mass march marking the anniversary of Reverend Martin Luther King Jr's historic "I have a dream" speech on 28 August 1963.
It was dubbed "Get Your Knee Off Our Necks," in reference to Mr Floyd, who suffocated beneath the knee of a white officer.
Often fighting back tears, relatives of Mr Floyd, Mr Blake and Breonna Taylor, a black 26-year-old shot dead by police in her apartment last March, took turns addressing the sea of people, who repeatedly called out the victims' names in response.
"Black America, I hold you accountable," said Mr Blake's sister Letetra Widman. "You must stand, you must fight, but not with violence and chaos. With self love."
Like his father 57 years ago, Martin Luther King III stood on the Lincoln Memorial steps and urged Americans to keep fighting inequality and to vote in November at all costs to defeat Trump in the election.
"We are taking a step forward on America's rocky but righteous journey towards justice," Mr King said.
