LATHAM, N.Y. -- A forklift explosion is what authorities say started a significant fire at the Pepsi Bottling Plant in Latham.

Crews say the fire broke out around 4:30 Wednesday morning after a propane tank on the back of a forklift exploded.

Authorities say no one -- including the fork lift driver -- were injured during the fire.

More than 100 firefighters responded to the scene.  They say it took them an hour to control the fire, which was making a huge amount of noise.

"The way the chief explained it to me is it sounded like a jet engine running and that was the tank of the propane that was burning off inside. And I also heard from the other members responding that they heard explosions,” said Colonie Deputy Fire Coordinator Michael Romano.

The building, which is one of the largest in the Colonie area, was completely evacuated.