The US Army is reprimanding nine officers for leadership failures in connection with the shooting rampage at Fort Hood, Texas, and their failure to detect problems with the accused shooter, Major Nidal Malik Hasan.
The Army said in a statement that although no single event directly led to the tragedy, certain officers failed to meet expected standards
A Pentagon review last year found that Hasan's supervisors expressed serious concerns about his questionable behaviour and poor judgment but failed to heed the warnings.
It said his supervisors continued to give him positive performance evaluations that kept him moving through the ranks despite worries about his strident views on Islam and worries about his competence.
Army Secretary John McHugh also has ordered a review of evaluation systems after the massacre that claimed the lives of 13 people.