WASHINGTON — President Barack Obama’s top counterterrorism adviser says it’s inconceivable that Osama bin Laden didn’t have some support in Pakistan, the country where he was hiding when he was killed in a firefight with U.S. forces.

John Brennan says the White House is talking with the Pakistani government and pledged to pursue all leads to find out what type of support system or benefactors bin Laden might have had.

Bin Laden was killed during a raid on a fortified compound in a Pakistani town two hours outside the capital of Islamabad.