An explosion just south of Cleveland, Oklahoma, dealt serious damage to a business there Tuesday afternoon. Police say ICES Corporation is likely a "total loss." Several crews on the scene are still battling the active fire. Firefighters were able to save the flag at the site of the explosion. Two people were injured and taken to Tulsa hospitals for burns. Fire officials say the victims were talking when taken out of the building. Only two people were reportedly inside the building work on the floors when a large explosion went through the building. A local pilot was able to give FOX23 an aerial view after the explosion. The Cleveland fire chief says temperatures inside the building likely reaches 1300 degrees Fahrenheit. He says the building insulated the fire and allowed it to heat up and spread quickly. Investigators have not determined the cause of the blaze, but they say they do not expect foul play. The Oklahoma State Fire Marshall's Office will conduct a formal investigation once the fire is fully extinguished sometime Wednesday morning. The company, an official Defense Department contractor, makes aircraft honeycomb. ICES Corporation employs around 50 people and is one of Cleveland's largest employers.