FORT HOOD, Texas (AP) – Gov. Rick Perry and U.S. Sen Ted Cruz say they’ve visited with military personnel wounded in Wednesday’s shooting at Fort Hood that left four dead and 16 wounded.

Perry told a media gathering Friday that he saw the “resilience” of military families recovering from the mass shooting. He says there “aren’t any easy answers” to what prompted Spc. Ivan Lopez to fire on fellow soldiers. Lopez killed three people before fatally shooting himself.

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Perry and Cruz met with wounded soldiers being treated at Darnall Army Medical Center at Fort Hood.

Cruz described Fort Hood as a “national treasure” and said in meeting with Army personnel at the base he heard stories of bravery and courage. He says one injured soldier took steps Wednesday to protect others from the shooter.

CBS 11 confirmed one more person injured in the shooting could be released from the hospital today.

The three other patients at Baylor’s Scott & White Memorial Hospital in Temple were upgraded to “fair condition.”

Investigators still don’t have a clear motive for Wednesday’s shooting rampage on the post.

There are reports that specialist Ivan Scott was upset over being denied time off,  along with others that say he had an argument with another soldier before the shooting.

Whatever the reason, 19 lives were directly affected and doctors say those who survived could face a long psychological recovery.

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“Many have come back and had combat experience.  You’re imagining they are in safe place and seeing family and having this kind of violence come about in their home — the likelihood that somebody would have a difficult emotional response to this is high,” said Dr. Alexander Thompson, Department of Psychiatry Chairman at Scott & White.

Fort Hood commanders are expected to hold another briefing on the investigation at 3 pm on Friday.

(©2014 CBS Local Media, a division of CBS Radio Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)

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