US Democratic presidential nominee Joe Biden has called violence at protests in Portland, Oregon, unacceptable and challenged President Donald Trump to stop "recklessly encouraging" it, after one person was killed during clashes between rival groups on Saturday.
Demonstrations against racism and police brutality have swept across the United States since the death in May of George Floyd, a 46-year-old black man who died after a Minneapolis police officer knelt on his neck for nearly nine minutes.
Protests have taken place in downtown Portland every night for nearly three months following Mr Floyd's death, and police there said they had made arrests after one person was shot dead on Saturday night.
"I condemn violence of every kind by anyone, whether on the left or the right. And I challenge Donald Trump to do the same," Mr Biden said in a statement, adding that "we must not become a country at war with ourselves."
"What does President Trump think will happen when he continues to insist on fanning the flames of hate and division in our society and using the politics of fear to whip up his supporters? He is recklessly encouraging violence," the former vice president added.
Republicans deny Mr Trump is seeking to exacerbate violence with incendiary rhetoric, saying he wants to restore law and order, and accusing Democratic mayors and state governors of losing control of cities rocked by demonstrations that have seen outbreaks of violence, arson and vandalism.
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The deadly violence we saw overnight in Portland is unacceptable. Shooting in the streets of a great American city is unacceptable.
— Joe Biden (@JoeBiden) August 30, 2020
I condemn violence of every kind by anyone, whether on the left or the right. And I challenge Donald Trump to do the same. https://t.co/JRuI7ya2Wv
Jason Miller, a senior adviser to Trump's campaign, said on Twitter that Mr Biden had "sat idly by for months, refusing to condemn violence and chaos from his allies in Democrat-run cities."
Mr Trump has emphasised "law and order" to motivate his political base and broaden his support.
The Republican president trails Mr Biden in national polls ahead of the election, due to take place on 3 November.
When is Slow Joe Biden going to criticize the Anarchists, Thugs & Agitators in ANTIFA? When is he going to suggest bringing up the National Guard in BADLY RUN & Crime Infested Democrat Cities & States? Remember, he can't lose the Crazy Bernie Super Liberal vote!
— Donald J. Trump (@realDonaldTrump) August 31, 2020
On Friday, Mr Trump said protesters were anarchists, agitators,rioters and looters.
Mr Biden has defended peaceful protesters, saying justice must be done, but he has repeatedly called for an end to violence.
His campaign said he would travel to southwestern Pennsylvania to speak on the safety challenges Americans face under Mr Trump, including chaos in cities, a pandemic and an "upside down" economy.
The president will visit Kenosha, Wisconsin, tomorrow after new protests erupted there last week following the police shooting of Jacob Blake, a black man, multiple times in front of his children, paralysing him.
LAW & ORDER!!!
— Donald J. Trump (@realDonaldTrump) August 30, 2020
