The commanding general at Fort Hood has just announced the suspect in the shooting deaths of 13 people at Fort Hood Thursday was not killed.

Maj. Nidal Malik Hasan, an Army psychiatrist, was shot and expected to survive.

Hasan is accused of opening fire at the Soldier Readiness Center at Fort Hood, which processes soldiers being deployed or returning from service overseas. In addition to the 12 dead, 31 were injured.

A female Fort Hood police officer shot Hasan. The Army originally reported that officer died. Lt. Gen. Bob Cone reported she is also alive.

Federal law enforcement officials say Hasan had come to their attention at least six months ago because of Internet postings that discussed suicide bombings and other threats.

The officials say they are still trying to confirm that he was the author. They say an official investigation was not opened.

The officials spoke on condition of anonymity because they were not authorized to discuss the case.

One of the Web postings that authorities reviewed is a blog that equates suicide bombers with a soldier throwing himself on a grenade to save the lives of his comrades.

Military officials in Washington say Hasan was a psychiatrist at Walter Reed Army Medical Center for six years before being transferred to the Texas base in July.

At the request of the Fort Hood Commanding General, the Texas Rangers will assist the military and FBI with the investigation.

“The Texas Rangers are an elite investigative force within the Texas Department of Public Safety and will provide assistance to federal authorities in the investigation of the tragic events that unfolded at Fort Hood,” Perry said.

Gov. Perry directed the Texas Rangers to Fort Hood Thursday along with Department of Public Safety troopers and helicopters, to assist in securing the perimeter of the post.

Fort Hood is home to more than 50,000 people; it is the largest military base in the country.