Osama killing: Pak speaks in different voices
"We still have many jihadi has-beens from the 1980s who are still alive and well and kicking, and some of them could have been helping them, but they are not in the state or government of Pakistan today," Pakistan`s ambassador to the US Hussain Haqqani said.
"Were there cracks through which things fell through? Absolutely. And we`ll investigate that; we`ll get to the bottom of it," he told ABC News in an interview.
Haqqani said as the investigations proceeds in this regard, heads would roll in Pakistan.
"Heads will roll, once the investigation has been completed. If those heads are rolled on account of incompetence, we will share that information with you (the US)," he said.
"And if somebody`s complicity is discovered, there will be zero tolerance for that, as well," he added.
Earlier, Pakistan Prime Minister Yusuf Raza Gilani said the US should not have taken a shortcut and bypassed Islamabad in its covert operation to kill bin Laden which violated the country`s sovereignty.
The Pakistan establishment has come under stinging criticism in the wake of the unilateral US action as also for its claim that it had no knowledge of the al Qaeda chief`s presence in Abbotabad.
"There was no need to (for the US to take) a shortcut or to bypass Pakistan," Gilani told reporters who accompanied him on an official visit to France.
In view of the long-standing relations with the US, Pakistan`s sovereignty should not have been violated, he said.
Reacting to Monday`s operation by US special forces inside Pakistani territory, Gilani said the issue of violation of sovereignty was a matter of concern for the country, particularly in view of the cooperation with the US in intelligence and defence.
He said relations with the US had seen many ups and downs in the past, including the incident of CIA contractor Raymond Davis, who was arrested after he killed two men in Lahore, and the killing of bin Laden.
Islamabad has also made it clear that it will take "some time" for biletaral ties between the US and Pakistan to normalise.
Bin Laden was killed along with his son, two al-Qaeda couriers and a woman during the pre-dawn raid by US forces on a compound located a short distance from the Pakistan Military Academy in Abbottabad, 80 kms from the federal capital Islamabad.
Gilani had earlier sought to deflect criticism of his government`s failure to detect bin Laden by describing it as an "intelligence failure of the whole world".