Workers are suspected of causing a fire that engulfed one of Bangladesh’s biggest garment factories which produces clothing for well-known retailers including the Gap and Walmart.

Firefighters were still battling flames on Friday after the 10-story building in the industrial district of Gazipur was set ablaze around midnight on Thursday.

Fifteen trucks carrying garments were also reportedly set ablaze.

“We were the biggest supplier of Gap in Bangladesh,” Nur-e-Alam, a senior manager of factory owner Standard Group, told Reuters. “Our cargoes were ready for shipment and all that was burnt up.”

News agencies are reporting no injuries at this time.

Local fire official Abu Jafar said the workers had a dispute with the company, the Associated Press reports, while Mosharraf Hossain, a senior officer in the industrial police force, told Agence France-Presse, “We think it’s an act of arson committed by workers from both inside the factory complex and outside.”