The CIA misled Congress and White House officials about its interrogations of terror suspects and mismanaged a program that was far more brutal and less effective than publicly portrayed, according to a report by Democrats on the Senate intelligence committee.

The harsh interrogations weren't effective and didn't produce key information that led to the killing of Osama bin Laden, contrary to claims by program supporters. Details of the program were kept hidden from policymakers, according to an executive summary of the 6,000-page report released Tuesday in Washington.

"This document examines the CIA's secret overseas detention of at least 119 individuals and the use of coercive interrogation techniques — in some cases amounting to torture," Sen. Dianne Feinstein, a California Democrat and chairwoman of the intelligence panel, said in a statement.