SEATTLE, Washington (CNN) -- A 16-year-old girl was found dead and another girl was found unconscious in an Army barracks at Fort Lewis near Tacoma, Washington, during the weekend, a base spokesman said Monday.

"Neither of the two women had any outward signs of trauma on them," said Fort Lewis spokesman Joseph Piek.

He said that an Army solider who was "allegedly an acquaintance" of the two 16-year-olds was questioned by investigators, but no arrests had been made.

The spokesman said the name and rank of the soldier who had been questioned was not being released.

According to an Army news release, the names of the two girls "are not being released due to their ages, their civilian status, and the nature of the ongoing investigation."

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The Fort Lewis Criminal Investigation Division is trying to determine why the two girls were in the barracks, where soldiers live, and what led to their conditions when they were found.

Emergency personnel from the base responded to a 911 call about 3:30 a.m. Sunday and found the two girls in one of the barracks. A doctor declared one of the girls dead on the scene, and the second girl was transported to Madigan Army Hospital, where she was in stable condition Monday.

The Office of the Armed Forces Medical Examiner is conducting an autopsy, Piek said, and it will be at least a week before results are complete.

Both girls are from the nearby South Puget Sound area but were not related to anyone living on base, Piek said. Both girls' families had been notified, he said.

Although Fort Lewis is not open to civilians, they can be escorted in by a soldier living there if they have identification and a reason for coming onto the facility.

The circumstances of how the girls came unto the base are under investigation, Piek said, but there was no evidence that security had been compromised.

About 30,000 military personnel are based at Fort Lewis. Barracks where soldiers live are usually split into rooms for one to three soldiers, Piek said. Details about the barracks where the girls where found were not released.

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