Protesters take part in the Million People March demonstration in London, Britain, Aug. 30, 2020. Hundreds of demonstrators took to the streets of west London on Sunday in the Million People March to protest against systemic racism in the UK. (Photo by Ray Tang/Xinhua)

Two police officers were shot as angry protests rippled across the US after authorities announced no one would be charged with the killing of Breonna Taylor.

Taylor, who was shot dead in her apartment by plainclothes officers, has become a symbol for the Black Lives Matter movement and demonstrators' calls for an end to what they say is unjustified police violence.

A grand jury charged one of the three officers involved in the raid with "wanton endangerment" over shots he fired into a neighboring home, but neither he nor his two colleagues will face charges over Taylor's death.

The news sparked protests across the country - including in New York, Boston, Washington DC and Los Angeles. 

But the biggest demonstration was in Taylor's hometown of Louisville, Kentucky, where two police officers were hospitalized after being shot late Wednesday.

"Both officers are currently undergoing treatment," interim police chief Robert Schroeder told reporters.

"One is alert and stable. The other officer is currently undergoing surgery and stable," he said, adding that one person had been arrested.

President Donald Trump, who is campaigning for reelection on a "law-and-order" platform, tweeted that he was "praying for the two police officers that were shot tonight in Louisville, Kentucky. The Federal Government stands behind you and is ready to help."

Thousands of demonstrators had flooded the streets of Louisville in the afternoon.

"Say her name - Breonna Taylor," they chanted. "No lives matter till black lives matter."

Police in riot gear made several arrests, and used flashbang grenades to clear hundreds of protesters from a park, where a memorial to Taylor was placed.

A state of emergency and an overnight curfew were declared for the city of 600,000, with much of downtown closed to traffic, and several shops boarded up in anticipation of violence.

Seething protests have rocked America's cities for months, with the movement's anger fed by a stream of deaths of black people at the hands of overwhelmingly white police, and exacerbated by badly fractured national politics and inflammatory rhetoric by Trump.

Taylor, an emergency room technician, died when three plainclothes policemen turned up at her door in the middle of the night to execute a search warrant.

Taylor's boyfriend, who was in bed with her, grabbed a gun and exchanged fire with the officers. He later said he thought they were criminals.

The officers, who had not activated their body cameras as required, shot Taylor multiple times. A police sergeant was wounded.

"Breonna Taylor deserves justice," 17-year-old black protester Decorryn Adams told AFP. 

"Nothing will change if we don't stick together."

AFP