The historic Harris’ building in downtown San Bernardino caught fire just after midnight Thursday, the second time the building has burned in recent months.

San Bernardino County Fire Department personnel arrived to find fire coming from the roof of the boarded up four-story building, at 300 N. E St., according to the fire agency’s Facebook post.

Witnesses outside the building told fire personnel there were people trapped inside. One woman was found in an elevator shaft in the building’s basement. She was asleep when the fire started, according to San Bernardino County fire spokesperson Eric Sherwin. She was escorted to safety without any injuries.

Building damage sustained in a fire in July created obstacles for the crew members so they called for more help. A total of 70 fire personnel arrived on the scene, and took control of the fire two hours after the initial team arrived, according to the county’s fire agency.

The historic building was home to Harris’ department store, which opened in 1927. Philip and Herman Harris, two of the three brothers involved with the business, opened the building to the public as a dry goods business in 1905.In 1947, the store gained the Inland Empire’s first escalator, originally dubbed a “motorstair.”

It shuttered in 1999, five years after Norton Air Force Base closed.

Earlier this year, the 270,000-square-foot building was donated to the city.

The cause of the fire remains unknown, but is under investigation, though it appears to be human-made, according to Sherwin.