The former leader of the far-right Proud Boys group was arrested on Friday outside the US Capitol, police said.
Enrique Tarrio, who was pardoned by President Donald Trump for his role in the 6 January 2021 riot at the Capitol, had just finished a news conference during which he and other Proud Boys announced plans to sue the US Justice Department.
Protesters attempted to drown out the event, held near the site of the riot, but the news conference went on as planned.
In a statement, US Capitol Police said that after the event concluded, a woman put a phone near Tarrio’s face, and officers allegedly saw him strike the phone and the woman’s arm.