Violence has erupted in cities across the US on the sixth night of protests sparked by the death in police custody of African-American George Floyd.
Curfews have been imposed in nearly 40 cities, but people have largely ignored them, leading to tense stand-offs.
Riot police clashed with protesters in New York, Chicago, Philadelphia and Los Angeles, firing tear gas and pepper bullets to try to disperse the crowds.
Police vehicles were set on fire and shops were looted in several cities.
The National Guard - the US reserve military force for domestic emergencies - said on Sunday that 5,000 of its personnel had been activated in 15 states and Washington, DC, where crowds once again gathered near the White House, this time lighting fires and throwing stones at riot officers.
US President Donald Trump tweeted: "Law & Order in Philadelphia, NOW! They are looting stores. Call in our great National Guard".
New cell phone video of a tanker truck driving into protestors on the 35W bridge. Video shot by witness Treye Harrison. pic.twitter.com/jiVvyzIA07
— Boyd Huppert (@BoydHuppert) May 31, 2020
The Floyd case has reignited US anger over police killings of black Americans. For many, the outrage also reflects years of frustration over socio-economic inequality and segregation.
[Source: BBC]
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