ISLAMABAD - The United States wants access to Osama bin Laden's three widows and any intelligence material its commandos left behind at the al-Qaida leader's compound, a top American official said in comments broadcast Sunday that could add a fresh sticking point in already frayed ties with Pakistan.

Information from the women, who remained in the house after the commandos killed bin Laden, might answer questions about whether Pakistan harbored the al-Qaida chief as many American officials are speculating. It could also reveal details about the day-to-day life of bin Laden, his actions since the invasion of Afghanistan in 2001 and the inner workings of al-Qaida.

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The women, along with several children also picked up from the house, are believed to be in Pakistani army custody. A Pakistani army official declined to comment Sunday on the request, which US National Security Adviser Tom Donilon revealed on NBC's "Meet the Press."

The CIA and Pakistan's spy agency, known by the acronym ISI, have worked uneasily together in the past on counterterrorism, but the unilateral US raid - done without Pakistan's advance knowledge - has exposed the deep mistrust that scars a complicated if vital partnership for both nations.

Even before the May 1 raid, the ISI said it was cutting cooperation with CIA to protest drone strikes close to the Afghan border, among other things. In the current environment, Pakistan could use the fact it has something Washington wants - bin Laden's widows - as leverage to reduce some of the pressure it is under.

Bin Laden was found in a large house close to a military academy in the army town of Abbottabad where he had been living for up to six years. His location raised US suspicions that he had help from some Pakistani authorities, possibly elements of the powerful army and intelligence services.

Donilon said Washington had seen no evidence that the Pakistani government had been colluding with bin Laden - the public line taken by most US officials since the raid, including President Barack Obama in comments also broadcast Sunday.

"But they need to investigate that," Donilon said. "And they need to provide us with intelligence, by the way, from the compound that they've gathered, including access to Osama bin Laden's three wives, whom they have in ... custody."

The American commandos killed bin Laden and up to four other people, including one of his sons, at the compound.

One of the wives is Yemeni, Pakistani officials have said. A copy of her passport, leaked to the local media, identifies her as Amal Ahmed Abdullfattah. She has allegedly told Pakistani investigators that she moved to the home in 2006 and never left the upper floors of the three-story compound, where bin Laden was living.

She is from the southern Yemeni province of Ibb, about 120 miles (193 kilometers) south of the capital, Sanaa. A family member there has sought a meeting with Pakistan's ambassador to Yemen to ask about her fate and whether she is to return to Yemen. The relative, a cousin named Walid al-Sada, said the ambassador did not know and promised to get back to the family.

Pakistan Foreign Ministry spokeswoman Tahmina Janjua said no countries have asked for the return of bin Laden's relatives. The Foreign Ministry in a statement last week said they were being well looked after and will be returned to their countries of origin.