MIAMI (CBSMiami) – Miami-Dade firefighters battled a massive fire at an oil transfer station in northwest Miami-Dade early Wednesday morning.

Chopper4 over the scene at 8470 NW 68th Street spotted thick flames and heavy smoke coming from two trucks that were burning in the parking lot of E.M.C Oil Corporation which recycles used oil and offers other environmental services.

The flames then spread as liquid on the ground ignited.

“We had multiple explosions during the firefighting which made us have to attack the fire from a little bit further back. We used our ladder units and, like I said, our foam truck to be able to get in and penetrate the fire,” said Miami-Dade Fire Rescue Lt. Kirsten Miller.

Firefighters managed to protect the surrounding buildings. There were people in the business at the time but they all made it out quickly. It took about an hour to put the fire out.

“These types of fires are extremely challenging in many different ways. But again, because of the intensity and the product (oil), we have to be very careful to protect both the citizens and employees,” said Miller.

There’s no word on what sparked the fire.

No injuries were reported.