We had no knowledge of US Osama bin Laden raid: Pakistan

Pakistan on Tuesday denied any prior knowledge of the US raid that killed Osama bin Laden, but said it had been sharing information about the targeted compound with the CIA since 2009.

The al-Qaeda leader was shot dead by US Special Forces in an attack on a sprawling compound near a military academy in the northwestern town of Abbottabad early on Monday.

"Neither any base nor facility inside Pakistan was used by the US forces, nor the Pakistan Army provided any operational or logistic assistance to these operations conducted by the US forces," the foreign ministry said in a lengthy statement.

While Islamabad hailed the killing of bin Laden as an important milestone in the fight against terrorism, the statement said Pakistan had expressed "deep concerns" that the operation was carried out without informing it in advance.

"This event of unauthorised unilateral action cannot be taken as a rule," the ministry said.

According to the statement, US helicopters entered Pakistani airspace by making use of "blind spots" in the radar coverage caused by the hilly terrain surrounding Abbottabad.

The foreign ministry said the Pakistani air force scrambled its jets within minutes of being informed of the US operation but there was no engagement with the US forces as they had already left Pakistani airspace.

It said Pakistan's Inter Services Intelligence (ISI) spy agency had been sharing information about the compound with the CIA and other friendly intelligence agencies since 2009 and had continued to do so until mid-April.

"It is important to highlight that taking advantage of much superior and technological assets, CIA exploited the intelligence leads given by us to identify and reach Osama bin Laden."