A U.S. Army spokesman says the man authorities say went on a shooting spree at the Fort Hood army post is in critical but stable condition.

Spokesman Col. John Rossi told reporters on Sunday at Fort Hood that Maj. Nidal Malik Hasan is still hospitalized in Texas. He was taken off a ventilator on Saturday.

Hasan was shot during an exchange of gunfire during Thursday's attack. The military moved him on Friday to Brooke Medical Center in San Antonio, about 150 miles southwest of Fort Hood.

Thirteen people were killed and 29 others wounded in Thursday's attack at Fort Hood.