ERIC TUCKER, Associated Press

WASHINGTON (AP) — Attorney General Eric Holder says he’s “disappointed” by the violence that followed the Ferguson grand jury decision.

Holder told reporters Tuesday that he is encouraged by some of the peaceful demonstrations, saying that “acts of violence threaten to drown out those who have legitimate voices” and that progress comes from nonviolence.

He says he has instructed his staff to work with leaders of the peaceful protesters to identify and isolate those who are bent on destruction in the community.

He says those who worked to stop others from violence are “heroes.”

Minutes after the decision not to indict Officer Darren Wilson was announced Monday night, protesters poured into the streets of Ferguson. Some commercial buildings were burned and dozens of people were arrested.