The Army psychiatrist charged in a deadly shooting spree at Fort Hood will be kept isolated from other inmates at the Texas jail where he's been transferred.

Maj. Nidal Hasan was airlifted from a San Antonio military hospital to the Bell County Jail in Belton at about 4 a.m. Friday.

Sheriff Dan Smith says Hasan will be kept in a cell in the jail infirmary and will be under 24-hour watch. Smith did not say whether Hasan is under guard because of fears for his safety or others.

Hasan had been at the military hospital since shortly after the Nov. 5 shooting spree that left him paralyzed. He is charged with 13 counts of premeditated murder and 32 counts of attempted premeditated murder.