Washington (AP) A training director at Walter Reed Medical Center says the man suspected of a shooting rampage that left 12 dead at Fort Hood, Texas, had some "difficulties" while he was an intern.

Dr. Thomas Grieger says Nidal Malik Hasan required counseling as a medical student because of problems with patients, but he didn't offer details of the issues.

He described Hasan as a "mostly very quiet" person who never spoke ill of the military or his country. He was at the center pursuing his career in psychiatry.

Law enforcement officials say he came to their attention at least six months ago because of Internet postings about suicide bombings, although it's not certain that Hasan is the author.

A fellow officer told Fox News Hasan fought his deployment to Iraq and argued with soldiers who supported U.S. wars.

Military officials say the 39-year-old Army major was shot four times during today's rampage and is on a ventilator and unconscious. % | save this article / add to your favorites list