"Pakistan's ISI expects a majority of threats to come from Islamist militants," Wall Street Journal reported quoting a senior ISI officer.
The Wall Street Journal said, a regular review of national security allocated a two-thirds likelihood of a major threat to Pakistan coming from militants rather from India or elsewhere.
"It's earth shattering. That's a remarkable change," Bruce Hoffman, a counter terrorism specialist and professor at Georgetown University was quoted as saying.
However the paper said it was unclear whether the assessment of the ISI, largely staffed by active military officers, was fully endorsed by Pakistan's military and civilian government.
The paper quoted Major Gen Athar Abbas, the chief Pakistan military spokesman, as saying he hadn't seen the ISI report. He said India remained a threat but confirmed that it is the ISI's role to draw up security assessments.