Fifteen injured Fort Hood soldiers remain hospitalized Monday, and are being treated for the injuries they sustained in the shooting massacre on Fort Hood's Army base, Commander Lt. General Robert Cone said.

Twenty-seven soldiers have been released, Gen. Cone said. The Army is now focusing its efforts on behavioral assessments and counseling for those involved.

"We're not sure what the impact of the incident has been on the larger Fort Hood population," Gen. Cone told reproters on Monday.

For the past three days, efforts have been focused on stress evaluation.

"Problems tend to happen down the road — 30, 60, 90 days — and so that's what we're really focused on," Gen. Cone told reporters.

More than 40 behavioral support specialists are on hand at Fort Hood to help soldiers and families deal with their stress and grieving. Additional resources are coming in as needed.

"Hasan was a soldier and we have other soldiers who might have the same stress and indicators that he had," Gen. Cone said.

A memorial service is planned for Tuesday. President Obama will speak at the ceremony. The ceremony will focus on the families of victims and the Fort Hood community as a whole.

Gen. Cone would not comment on the investigation into suspected shooter Major Nidal Malik Hasan.

Fort Hood currently has high security measures in place, mainly to reassure the base residents that they are being kept safe, according to Gen. Cone.