Police and protesters clash in violent weekend across the US

Protests took a violent turn in several U.S. cities over the weekend with demonstrators squaring off against federal agents outside a courthouse in Portland, Oregon, forcing police in Seattle to retreat into a station house and setting fire to vehicles in California and Virginia. A protest against police violence in Austin, Texas, turned deadly when police said a protester was shot and killed by a person who drove through a crowd of marchers. The unrest Saturday and early Sunday stemmed from the weeks of protests over racial injustice and the police treatment of people of color that flared up after the May 25 death of George Floyd in Minneapolis.