WASHINGTON (AP) — With cities wounded by days of violent unrest, America headed into a new week with neighborhoods in shambles, urban streets on lockdown and shaken confidence about when leaders would find the answers to control the mayhem amid unrelenting raw emotion over police killings of black people.

The demonstrations were sparked by the death of George Floyd, a black man who pleaded for air as an officer pressed a knee into his neck.

Floyd’s death in Minneapolis came after tensions had already flared after two white men were arrested in May for the February shooting death of black jogger Ahmaud Arbery in Georgia, and the Louisville police shooting death of Breonna Taylor in her home in March.

“They keep killing our people.

Tensions rose Sunday outside the White House, the scene of three days of demonstrations, where police fired tear gas and stun grenades into a crowd of more than 1,000 chanting protesters across the street in Lafayette Park.

Mayor Keisha Lance Bottoms said t wo officers had been fired and three placed on desk duty after video showed police surrounding a car Saturday, and using stun guns on the man and woman inside.

In Los Angeles, a police SUV accelerated into several protesters in a street, knocking two people to the ground.

In Minneapolis, the officer who pressed his knee onto Floyd’s neck has been charged with murder, but protesters are demanding the other three officers at the scene be prosecuted.

In Indianapolis, two people were reported dead in bursts of downtown violence this weekend, adding to deaths reported in Detroit and Minneapolis.

At the Minneapolis intersection where Floyd was killed, people gathered with brooms and flowers, saying it was important to protect what they called a “sacred space.”.

Among those in Minneapolis was Michael Brown Sr., the father of Michael Brown, whose killing by a police officer in Ferguson, Missouri, set off unrest in 2014.