Aerial views, released by the United State Department of Defense May 2, 2011, shows before (L) and after (R) views of the compound that Osama bin Laden was killed in on Monday in Abbottabad, Pakistan. - Reuters Photo

ISLAMABAD: Sources claimed on Friday that a secret CIA office existed in Abbottabad which provided key intel to the CIA headquarter about Osama bin laden’s compound for US military operation that killed Bin laden, DawnNews reported.

Reliable sources told DawnNews that contacts between CIA and Pakistani ISI had discontinued after April14.

According to some sources it was around this time that the CIA established its undercover office in Abbottabad to finalise preparations for the operation against Al Qaeda chief  Osama Bin Laden.

Sources also added that the Pakistani ISI was unaware about the establishment of a secret CIA office in Abbottabad.