The United States has been negotiating highly sensitive understandings with the Pakistani military about the security of Pakistan's nuclear arsenal, investigative journalist Seymour Hersh reported in the latest issue of The New Yorker magazine.

At the same time, the Pakistani military would be given money to equip and train Pakistani soldiers and to improve their housing and facilities, the report says.

The principal fear was that extremists inside the Pakistani military might stage a coup, take control of some nuclear assets, or even divert a warhead, Hersh notes.