The riots lasted three days and ended only after Mayor Jeffries and Governor Harry Kelly asked President Franklin Roosevelt to intervene. He ordered in federal troops; a total of 6,000 troops imposed a curfew, restored peace and occupied the streets of Detroit. Over the course of three days of rioting, 34 people had been killed; 25 were African Americans, of which 17 were killed by the police (their forces were predominantly white and dominated by ethnic whites). 13 deaths remain unsolved. Nine deaths reported were white, and out of the 1,800 arrests made, 85% of them were black, and 15% were white. Of the approximately 600 persons injured, more than 75 percent were black people.