Investigators on Thursday searched the home of the man who opened fire at Fort Hood in Texas, killing three people and wounding more than a dozen others before taking his own life.
A spokesman at Fort Hood say they've also been questioning the wife of the soldier, who's been identified as Ivan Lopez.
INTERACTIVE: Fort Hood Shooting
A top Army official says the soldier had seen a psychiatrist last month, and didn't show any signs of being a threat to himself or others. Army Secretary John McHugh adds that there are no apparent ties to extremist groups.
He says the soldier didn't see any combat during a four-month deployment to Iraq in 2011.
A woman who lived in the same apartment complex as Lopez near Fort Hood says not many people knew him or his wife very well, because they had just moved in a few weeks ago. She says she would see Lopez in uniform going to his car every morning, and that he was friendly.
At a hospital that's treating nine of the survivors of the shooting, doctors say at least three are in critical condition, but they are expected to survive.
A hospital physician says he doesn't expect any more fatalities resulting from the shooting at Fort Hood that left four dead and wounded 16 others.
Dr. Matthew Davis said during a news conference Thursday that he's optimistic none of the three critically wounded patients being treated at Scott & White Memorial Hospital will succumb to their injuries.
Davis says "several" of the victims at the hospital northeast of Austin will be discharged Thursday, but he didn't say how many. He described them as in "good spirits."
According to a statement from New York Gov. Andrew Cuomo, one of the people wounded was 32-year-old Maj. Patrick Miller, an Iraq War veteran from western New York. Miller lives with his wife outside Austin, Texas. Information on his condition hasn't been released.