18 May 2011 Last updated at 18:05 ET
US officials have said there was no evidence indicating leaders in Islamabad knew Osama Bin Laden had been hiding in Pakistan.
But defence secretary Robert Gates said he believed "somebody" in Pakistan knew the whereabouts of the al-Qaeda chief.
Top military officer Adm Mike Mullen said it might take a while to find out if Bin Laden had Pakistani protectors.
Amid increasing pressure from US lawmakers, both men advised against cutting off aid to Pakistan.
In a joint news conference at the Pentagon, Mr Gates and chairman of the Joint Chiefs of Staff Adm Mullen said the US must continue to work with Pakistan and provide aid to the country.
But the officials said Pakistan must take action to eliminate the safe havens where militants are allegedly hiding along the border with Afghanistan.
Mr Gates said that though he believed "somebo
In: World News
Tags: pakistan, osama bin laden, united states, robert gates,
Location: Washington D.C., District of Columbia, United States (load item map)
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