Washington: The elite US Navy SEALs have been warned against betraying their promise to maintain secrecy and not speak to the media to gain "public notoriety and financial gain", just days before the broadcast a documentary with a commando who claims to have shot Osama bin Laden in Pakistan.

The October 31 letter from Admiral Brian Losey specifies that the warning holds even after a mission is over, and it scolds those seeking public credit.

The admonition is seemingly directed both at Matt Bissonnette -- who revealed his role on the 2011 bin Laden mission with "60 Minutes" on Sunday -- and at a SEAL at the center of an upcoming Fox News documentary.

The letter from Losey obtained by CNN was addressed to "teammates" and sought to shame those who sought public acclaim, reminding SEALs "the most important credit we can garner is the respect of our Teammates and Partners."

"We do not abide willful or selfish disregard for our core values in return for public notoriety and financial gain," Losey writes.

"Any real credit to be rendered is about the incredible focus, commitment, and teamwork of this diverse network and the years of hard work undertaken with little individual public credit. It is the nature of our profession," he says.

The missive was first reported by SOFREP, a website that covers the Special Operations community.

The letter is not the first. Losey's predecessor also sent a letter reminding SEALs to keep the confidence of the mission, the report said.

While Losey does not mention the slain al Qaeda chief raid directly, it is the publication of those details and the mission to free the captured sailors of the Maersk Alabama in 2009 off the coast of Somalia that have gained much publicity.

SOFREP has identified the so-called "shooter" of bin Laden, who was the unnamed subject of a Esquire magazine article last year and whose identity will reportedly be revealed in an upcoming Fox News documentary.

The claims in the Esquire article were met with skepticism by those in the SEAL community who said the close quarters and darkness and intense shooting made it difficult to determine whose bullets killed bin Laden, the report said.

The Pentagon and Justice Department are conducting a criminal inquiry of Bissonnette and his bestselling book about the raid in Pakistan's garrison city of Abbottabad. That inquiry has delayed a legal settlement between the government and the author over profits from the book.

Bissonnette did not seek the legally required government review before he published the book "No Easy Day" in 2012. The book recounts what he says is his role as one of the SEAL Team Six members who shot and killed bin Laden.

The Pentagon will not even confirm that Bissonnette was even on the raid, CNN said.