U.S. Secretary of State Hillary Clinton arrived in Islamabad Friday to patch up tense relations between the U.S. and Pakistan following the raid that killed al-Qaeda terror mastermind Osama bin Laden. Clinton said there is no evidence any high-ranking Pakistani officials were aware of the al-Qaeda leader’s whereabouts.

“There is absolutely no evidence that anyone at the highest levels of the Pakistani government knew he was living just miles from where we are today,” said Clinton.

She also said Pakistan must take “decisive steps” against terrorism.

Clinton was accompanied by the chairman of the U.S. Joint Chiefs of Staff, Adm. Mike Mullen, who called for closer cooperation.

“Now is not the time for retreat or for recrimination,” said Mullen at a news conference, acknowledging that the U.S. raid on bin Laden’s compound caused diplomatic problems with Pakistan. “Now is the time for action and closer coordination. For more cooperation, not less. For the friendship to get stronger, not weaker.”

Tensions between the U.S. and Pakistan have increased since the May 2 raid on bin Laden’s compound in Abbottabad.

U.S. lawmakers have questioned aid to $7.5 billion in aid to Pakistan over five years, with many unconvinced Pakistan is committed to fighting terrorism in the region.