SEATTLE Police used flash bangs and pepper spray as officers and protesters clashed late Wednesday when a May Day rally turned violent in Seattle.
Protesters threw several objects, possibly rocks and other items, at police officers and news crews.
Officers responded by using flash bangs and pepper spray and using their bikes as shields in an attempt to control the crowd. A few people were seen taken into custody.
Earlier in the day, thousands of people marched peacefully through downtown.
The violence broke out later in the evening after a separate march started at the Capitol Hill neighborhood.
Many of the protesters are self-described anarchists.