NEW He said it was assumed Pakistan was asking all Arab allies . : A second source says Pakistanis were aware of heightened activity , but did not pinpoint it to Abbottabad . Pakistan knew about the intelligence activity in the city too , first source says . Pakistani officials did not believe the uptick in activity was due to Mohammed bin Laden , first source says . The relationship between Pakistan and the United States is increasingly tense .
NEW : A second source says Pakistanis were aware of heightened activity , but did not pinpoint it to Abbottabad . Pakistan knew about the intelligence activity in the city too , first source says . Pakistani officials did not believe the uptick in activity was due to Mohammed bin Laden , first source says . The relationship between Pakistan and the United States is increasingly tense .