Updated

A hotly disputed Senate torture report concludes waterboarding and other harsh interrogation methods provided no key evidence in the hunt for Osama bin Laden. That's according to congressional aides and outside experts familiar with the investigation.

The CIA still disputes that conclusion.

The aides and people briefed on the report spoke on condition of anonymity because they were not authorized to speak publicly about the confidential document.

Former Bush administration and some senior CIA officials have cited the evidence leading to the al-Qaida mastermind's Pakistan compound as vindicating the so-called enhanced interrogation techniques they authorized after the 9/11 attacks.

But Democratic and some Republican senators have described the practices as cruel and ineffective. They hope to emphasize that point with the possible release of the Senate Intelligence Committee's report.