A brawl between supporters of President Erdogan of Turkey and his critics erupted in Washington D.C. on Tuesday, drawing sharp criticism from political leaders in the United States.

11 people were wounded in the melee, including a police officer, as the pro-Erdogan group rushed an organized protest outside of the Turkish embassy. Two Secret Service agents were also assaulted as law enforcement authorities attempted to control the scene.

Turkey has blamed the protest, and ensuing assault, on groups associated with the Kurdistan Workers Party (PKK), a known terrorist group labeled as such by Turkey and the United States. This is disputed by local American law enforcement, who says they were simply peaceful protesters.