Six Nations firefighters were quick to respond to an early morning structure fire on Sunday.

Crews were called to Chiefswood Road just after 4 a.m., according to a news release.

Upon arrival, they say they found that a large warehouse, previously known to be a cigarette factory, had visible flames and smoke that engulfed the entire south side of the building.

A defensive fire operation was put in place, due to the high risk of the building collapsing.

The warehouse was not located near water hydrants so water tankers from both Brant County and Haldimand County Fire were brought in to shuttle water, according to Six Nations Fire.

Just before 6:30 a.m., the fire was finally extinguished.

No injuries or fatalities have been reported.

The building did collapse, but no firefighters were inside at the time.

The cause of the fire is under investigation and firefighters will remain on scene throughout the day and possible into tomorrow.

The Ontario Fire Marshal has been contacted to help with the investigation.