FILE - This book cover image released by Dutton shows "No Easy Day: The Firsthand Account of the Mission that Killed Osama Bin Laden," by Mark Owen with Kevin Maurer. The firsthand account of the Navy SEAL raid that killed Osama bin Laden contradicts previous accounts by administration officials, raising questions as to whether the terror mastermind presented a clear threat when SEALs first fired upon him. (AP Photo/Dutton, File)

A Pentagon official says a former Navy SEAL's insider account of the raid that killed Osama bin Laden contains classified information.

Pentagon press secretary George Little told reporters Tuesday that an official review of the book, "No Easy Day," determined that it reveals what he called "sensitive and classified" information. He was not more specific but said the book should have been submitted to the Pentagon before publication for a formal review of potential disclosures of such information.

A lawyer for the author, Matt Bissonnette, has disputed that he was legally obliged to have the book screened before publication.

Little would not say what damage may result from the book's revelations.

Little said the Pentagon has not taken steps to stop the book from being sold on military installations.