"Some information in the CIA charge-sheet was so damning that the Pakistanis could not deny them," a senior official familiar with the talks told the Dawn newspaper.

Diplomatic and US sources said the allegations included in the "charge-sheet" were almost identical to what The New York Times had reported on Wednesday.

The US daily had also reported about CIA Deputy Director Stephen R Kappes' secret visit to Islamabad last month to confront Pakistan with information about the ISI's links with militants in the northwestern tribal areas.

CIA chief Hayden, who met Gilani at a dinner on Monday, is believed to have told the Prime Minister that Pakistan will have to do something about the alleged involvement of ISI officials with militants.

Hayden also told Gilani that even a change of government in Washington would not help Pakistan as whoever occupied the White House in January would want Islamabad to "rein in the ISI", said the senior official.