MIAMISBURG, Ohio (WDTN) — Workers at a Miamisburg manufacturing plant had to evacuate after a fire early Thursday.

It happened around 2:40 a.m. Thursday at the Avery Dennison plant on Monarch Lane.

An employee tells 2 NEWS his shift had just started when a fire alarm went off.

There were 20 workers inside the plant when the fire started. Everyone got out safely.

Fire officials say a motor on the roof caught on fire. Crews were able to contain the fire quickly.

Crews battle a fire on the roof of the Avery Dennison manufacturing plant in Miamisburg on Thursday, November 14, 2019. (Photo: Bear Everett)

The business will be open to reopen. The Miamisburg Avery Dennison plant makes labels.

The cause of the fire is under investigation.