Large demonstrations turned violent around the country over the weekend as tens of thousands of Americans continued a monthslong wave of civil unrest protesting racism and police tactics.

Seattle protesters hurled rocks and explosives at police officers during violent confrontations near the police department’s East Precinct station on Saturday. Dozens of people were arrested and 59 officers were injured, including many with burns and abrasions, according to police. The explosives also caused structural damage to the station, the officials said.

In Portland, Ore., where protesters have been marching for more than 50 days, thousands of demonstrators—some wearing gas masks and carrying shields, leaf blowers and hockey sticks—gathered outside the U.S. Courthouse, police officials said. Some in the crowd threw rocks and fireworks before breaking through a section of reinforced fence surrounding the building.

In Austin, Texas, a protester was fatally shot during a Black Lives Matter gathering near the state capitol.