According to state police, the federal Bureau of Alcohol, Tobacco, Firearms and Explosives said the origin of the fire was “incendiary,” the New York Post reported.
The investigation is ongoing, so further details or damage assessments have not been disclosed.
Roughly 600 employees had to evacuate the Fishkill facility before 11:00 p.m. on Aug. 29, but no injuries were reported.
Workers had been forced to stay home from work while Gap worked to determine whether they could move operations elsewhere until the damages were assessed and restored.
The Post said Wednesday that some of the center’s 1,300 employees were scheduled to return to work this week in areas of the facility in areas that weren’t damaged.
The retailer said at the time that it would take time to understand the impact and cause of the fire but that it would rely on already in place contingency plans to “continue to serve our customers.”
Sales at Gap stores declined 3 percent in the second quarter ended July 30 and CEO Art Peck said he’s “unsatisfied with the pace of improvement across the business,” so a setback from the center fire could further hinder the pace of improvement.