ALLENTOWN, Pa. (VINnews) — A massive six-alarm fire described by one witness as “the biggest fire I’ve ever seen” destroyed a former furniture factory in Allentown, damaged several nearby homes and prompted evacuations, authorities said.

The fire broke out around 8:45 p.m. Wednesday at the former American Atelier furniture factory on North Front Street. Firefighters battled heavy flames as parts of the roof and interior floors collapsed.

Residents on part of North Front Street were evacuated, while others nearby were advised to shelter in place. No injuries were reported.

At the height of the blaze, more than 2,000 utility customers lost power. The cause of the fire remains under investigation.