The military will formally discipline at least six officers, mostly from Walter Reed Army Medical Center in Washington, for failing to take action against the officer accused of carrying out last year's deadly shooting rampage at Fort Hood, according to people familiar with the matter.

Senior Army officials said the decision to punish so many officers reflects the military's belief that the November assault, which killed 13 people at the Army base in central Texas, could have been prevented if Maj. Nidal Hasan's superiors had alerted authorities to his increasing Islamist radicalization.

The officials said that as many as eight officers could ultimately be censured over Hasan, mostly with letters of reprimand that effectively end their military careers. The punishments will be detailed in an "accountability review" that Army Gen. Carter Ham, who has been investigating the shootings for several months, will deliver to top Army officials as early as Friday.

An Army spokesman said that Ham's accountability review would be submitted within days, but declined to comment further on the inquiry.

People familiar with the matter said the Army had earlier notified eight officers that they were under investigation, including Col. John Bradley, who until recently ran Walter Reed's psychiatry department, and Col. Charles Engel, a psychiatrist who supervised Hasan when he was doing a fellowship at the Uniformed Services University of the Health Sciences.

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