Maj. Nidal Malik Hasan, the U.S. Army psychiatrist accused of killing 13 fellow military members at Fort Hood, has been taken off a ventilator, the Army said.

Hasan remains in intensive care at Brooke Army Medical Center in San Antonio, Fort Hood spokesman Col. John Rossi told reporters Saturday.

Rossi said he does not know if Hasan can communicate.

Hasan, 39, was shot four times by two civilian officers after he allegedly opened fire with two handguns Thursday. A dozen people died soon after being shot, and one died later in a hospital, officials said, while 38 were wounded.

Rossi said 17 victims remain hospitalized.