Spokesman Col. John Rossi told reporters on Saturday at Fort Hood that he is not sure if Maj. Nidal Malik Hasan is able to communicate.
Hasan was shot during an exchange of gunfire during Thursday's attack, in which.
The military moved Hasan Friday to Brooke Medical Center in San Antonio, about 240 kilometres southwest of Fort Hood. Army officials have said Hasan is "not able to converse."
CBS News has learned that Hasan visited his mosque the morning of the attack. He reportedly had dinner the night before with Imam Syed Ahmed Ali, the imam at his mosque, and others. Ali said there was nothing strange about Hasan's behavior at dinner or at the mosque.
More Coverage of the Tragedy at Fort Hood:
Fort Hood Suspect Said Methodical Goodbyes
Hasan Reportedly Felt U.S. Attacked Islam
Neighbor: Ft. Hood Suspect Packed Up Home
Hasan's Remarks Worried Muslim Leader