TAMPA, Fla. -

A fire in a storage building at a Yuengling Brewery complex in Tampa, Fla. caused an estimated $1 million in damage and took about an hour to control, authorities said.

The brewery's workers were evacuated safely when the fire erupted Saturday evening.

The fire has been ruled accidental by investigators, who are still seeking the exact cause, according to a Tampa Fire Rescue statement.

Dozens of firefighters backed by aerial ladder trucks put out the blaze. One firefighter suffered a minor injury and was treated at a hospital and released.

Yuengling, founded in 1829, is the oldest brewery of beer in the U.S. The company is based in Pottsville, Schuylkill Co.