San Francisco Sheriff Michael Hennessey on Monday announced that a survey of the county jail population shows that more than 60 percent of the prisoners are black.

In a news release, he cited U.S. Census Bureau numbers from 2006 showing that blacks make up 6.7 percent of the population in The City.

“It is puzzling that at a time when San Francisco lost 35 percent of its African-American population, the African-American jail population could increase by 10 percentage points,” Hennessey, right, said in the release. “I am concerned that the criminal justice system and the war on drugs, specifically, are … disproportionately adversely affecting San Francisco’s African-American community.”