WASHINGTON-The United States said Friday it agreed with a conclusion of the UN report on former PM Benazir Bhuttos murder that she lacked the necessary protection after she returned to Pakistan from an eight-year exile. 'We have the report, We are reviewing it. The US cooperated fully not just in this UN investigation but obviously the independent Scotland Yard investigation that preceded it, P J Crowley, Assistant Secretary of State for Public Affairs, said when asked to comment on the report. 'I dont want to get in particulars of the report. The US encouraged her return, we encouraged Pakistans return to a civilian government, civilian rule. 'Clearly, tragically there were failures at a number of levels where she did not have the protection that she deserved and obviously needed. But I am not going to comment on the particular report. The report speaks for itself, the spokesman added, when questioned if Benazir Bhutto was advised on the threats she would face on her return. Crowley paid tributes to the popular Pakistani leader for her abiding commitment to the cause of democracy and pledged that the US would help Pakistan develop democratic institutions. 'The assassination was a tragedy for people of Pakistan and Benazir Bhutto gave her life in defence of the development of Pakistans democratic institutions. He said US 'will continue to work with Pakistan to make sure that we build the institutions and take democracy forward.