General David Petraeus, commander of all U.S. and NATO troops in Afghanistan, could become CIA director, multiple sources have reportedly told NPR.

The public radio network reported Monday that Petraeus is being "seriously considered" to be the next spy chief, and " would take the job if offered."

NPR sources included more than one government official.

Leon Panetta, the current CIA Director, was also reportedly being seriously considered to replace Defense Secretary Robert Gates, according to NPR.

"Petraeus is tired, really exhausted," one defense analyst told Yahoo's Laura Rozen.

"He stepped into the breach, and I think the plan was for him to come in and serve out the remainder of McChrystal's time. But McChrystal was well rested when he took the job. Petraeus is still recovering from cancer. He went from one extremely high-stress position to another."

Petraeus' move out of Afghanistan "has been in the works," and is likely to happen in the summer, the analyst said.

While it wouldn't be unheard of for a general to take over the CIA, Petraeus has no official history commanding an intelligence service.

Former president George W. Bush appointed retired Air Force General Michael Hayden to head the agency in 2008.

"The possible move shows that the Obama administration is having a hard time finding a slot for the general, once considered a potential 2012 nominee for Republicans," The Telegraph's Toby Harnden noted. "Some might view a Petraeus appointment to the CIA as an attempt by President Barack Obama to neutralise a possible rival."

White House and Pentagon officials would not comment on personnel changes.