Updated

As many as eight Army officers may be punished for failing to heed warning signs and take action against suspected Fort Hood gunman Maj. Nidal Hasan, a U.S. official said Thursday.

First reported in the Los Angeles Times, an official familiar with a Pentagon review of the case, which will be discussed at a briefing Friday, said the officers who face discipline hold ranks of colonel and below.

The review reportedly found that superiors allowed Hasan, an Army psychiatrist, to advance within the ranks despite his failings to meet physical and professional standards. Hasan avoided physical training, was overweight and frequently late, but was seen by superiors as a rare medical officer and thus avoided corrective action.

"Had those failings been properly adjudicated, he wouldn't have progressed," the official told the Times.

Additionally, the Pentagon review into the deadly rampage that killed 13 found that the Defense Department does not do an adequate job of sharing information about internal personnel, and it focuses more on hunting spies than ferreting out extremists.

The Defense Department made public its own review of the rampage earlier this week and found that doctors overseeing Hasan's medical training repeatedly voiced concerns over his strident views on Islam and his inappropriate behavior, yet continued to give him positive performance evaluations that kept him moving through the ranks.

Both reviews seem to point to the fact that supervisors failed to heed their own warnings about an officer ill-suited to be an Army psychiatrist.

Recent statistics show the Army rarely blocks junior officers from promotion, especially in the medical corps.

Hasan showed no signs of being violent or a threat. But parallels have been drawn between the missed signals in his case and those preceding the thwarted Christmas attempt to blow up a Detroit-bound U.S. airliner. President Barack Obama and his top national security aides have acknowledged they had intelligence about the alleged bomber, Umar Farouk Abdulmutallab, but failed to connect the dots.

Hasan remains under guard at Brooke Army Medical Center in San Antonio, where he is paralyzed from the upper chest down, his lawyer John Galligan told Fox News. Hasan also has "several other medical issues" related to his gunshot wounds, Galligan said.

The Associated Press contributed to this report.