ISLAMABAD - US Senator John Kerry will push Pakistani leaders on Monday to explain how Osama bin Laden was able to hide in their country for years, without further inflaming Pakistani anger over the US raid that killed the al-Qaida chief.  

US special forces flew in from Afghanistan on a secret operation to find and kill the al-Qaida leader on May 2, nearly 10 years after he orchestrated the September 11 attacks on the United States.

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His discovery holed up in the comfortable garrison town of Abbottabad, only 50 km (30 miles) from the Pakistani capital, has revived suspicion that US ally Pakistan knew where he was and has been playing a double game.

Pakistan has rejected that as absurd. It welcomed bin Laden's killing as a big step in the fight against militancy but objected about being left in the dark over the raid to get him.

Parliament condemned the raid on Saturday as a violation of Pakistan's sovereignty and called for a review of ties.

It also said the government should consider cutting US supply lines through Pakistan for US forces in Afghanistan in the event of another "unilateral" assault.

Kerry arrived in Pakistan on Sunday from Afghanistan where he told reporters the United States wanted Pakistan to be a real ally in the fight against militancy.

Kerry, a Democrat close to the Obama administration and who is chairman of the Senate Foreign Relations Committee, met powerful army chief General Ashfaq Kayani at army headquarters late on Sunday and was due to meet other leaders on Monday.

While Kerry has tough questions for Pakistan, its military can be expected to convey its anger over the US assault on bin Laden, which military officials say has caused a breakdown in trust and cast a shadow over security cooperation.

"Kayani ... apprised the visiting dignitary about intense feelings of rank and file of the Pakistan army on the Abbotabad incident," the military said in a statement on Monday, referring to the operation to get bin Laden.

It did not elaborate but said Kerry would hold detailed discussions on relations with government leaders on Monday.

"DISENCHANTED AND DISMAYED"

The Nation newspaper, which generally reflects the thinking of the military establishment, said Kerry's mission was to pressure Pakistan into accepting all US demands, even at the cost of Pakistan's national interests.

"The US may have serious questions post-Osama episode, but Pakistan stands totally disenchanted and dismayed," the paper said in an editorial.

The government should stick to the positions spelled out by parliament on the weekend, it said.

"There should be no compromise on sovereignty and national interests at any costs."

The US administration has not accused Pakistan of complicity in hiding bin Laden but has said he must have had some sort of support network, which it wants to uncover.  

US Secretary of State Hillary Clinton spoke on Sunday to President Asif Ali Zardari by telephone about the situation since bin Laden's death, Zardari's office said, adding Zardari told Clinton about parliament's concerns.

"Both agreed to resolve the issues amicably and move forward," the president's office said.

Compounding Pakistan's reputation as an unstable Muslim country infested with militants, gunmen on motorcycles shot dead a Saudi diplomat in the city of Karachi on Monday as he was driving to work.  

The attack came days after unidentified attackers threw two hand grenades at the Saudi consulate in the city, Pakistan's commercial hub. No one as hurt in that attack.

al-Qaida is violently opposed to the Saudi government, which is a close ally of Pakistan, and has vowed revenge for the killing of its leader, Saudi-born bin Laden.